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EUROBIKE, 28 August 2014. Lectures on LEV Components within the LEV Components Special Exhibition.
Read the article: extraenergy.org/main.php?language=en&category=&su...
The Maryland National Guard hosted the second Maryland Senior Reserve Component Commanders Conference on Saturday, October 24, 2009, at Camp Fretterd Military Reservation near Reisterstown, Md.
The purpose of the informal conference was to exchange ideas of how the reserve components of all the services in Maryland can work together in a mutually beneficial manner.
In addition to the many military attendees, representatives from the U.S. Department of Veterans Affairs, Employer Support of the Guard and Reserve and the Johns Hopkins U.S. Family Health Plan were in attendance.
We suggest all our customers submitting boards to us take few simple steps to make sure the board isn’t exposed to potential damage to electrostatic shock during transit.
www.tfix.co.uk/how-to-safely-package-macbook-logic-board-...
We stock a full range of Thomson rack components including the Elite seatposts, stems and for an extra touch of class; 27.2mm seatpost clamps.
via
It is often overlooked what a decisive influence seals and gaskets have on the function and service life of machines and systems.
Proportional valves, for example, are limited in their function and endangered even from dirt particle sizes of 3 μm. Rolling bearings, on the other hand, are considerably impaired in terms of their service life by water content in the lubricant of just 200 ppm and can be damaged.
Seals basically fulfill two tasks for rotating or linear components: On the one hand, they protect the sensitive inner life of the machine elements from contamination, and on the other hand, they protect the environment from leaking lubricants or hydraulic operating fluids, for example.
Criteria for seal and gasket selection
In principle, three criteria apply when selecting the right seal:
1. Design specifications: Here, it is important to consider how the components behave towards each other.
2. Chemical and physical loads: Here it must be taken into account how large or different the pressure conditions are and how they behave with the temperatures. It must be checked whether friction occurs. An important aspect is whether sealing is required against corrosive substances that could attack the sealing material.
3. In the area of economy and assembly, the number of seals required must be taken into account and how the maintenance requirements are to be assessed.
What forms of gaskets and seals are there?
Basically, there are two forms of seals: Dynamic seals are used where the interfaces move. Static seals, on the other hand, are used where the interfaces are at rest. Examples of static seals are metal O-rings, flange seals or liquid seals. In general, the following applies: Since dynamic seals can only be realized by means of a gap – albeit a very narrow one – between the sealing surfaces, a 100-percent seal cannot be guaranteed. Often, however, these “leaks” are intentional, since the minimal escaping substances serve as lubricant. However, the leakage must not be too large to prevent serious damage.
Materials for gaskets
The operating temperature range and media resistance are the most important criteria when selecting materials for seals.
Nevertheless, the mechanical-technological values of an elastomer compound must be taken into account in an appropriate manner, as they are decisive for the service life of the seal.
Gasket material Flexseal NBR – acrylonitrile-butadiene rubber
NBR is one of the most widely used materials for seals. It is used in many areas due to its good mechanical properties and resistance to mineral oil-based lubricating oils and greases. However, good resistance to fuels is usually only achieved with special compounds.
The properties of Flexseal NBR are mainly determined by the acrylonitrile content (ACN between 18% and 50%). A low ACN content of NBR leads to good low-temperature flexibility but limited resistance to oils and fuels; as the ACN content increases, the low-temperature flexibility of Flexseal NBR decreases and the resistance to oils and fuels increases.
The NBR standard material has a medium ACN content to cover a wide range of applications as a gasket material with balanced properties. Flexseal NBR shows good mechanical-technological values, e.g. high abrasion resistance and good resistance to mineral oil-based lubricating oils and greases, hydraulic oils H, H-L, H-LP, flame-retardant pressure fluids HFA, HFB, HFC, aliphatic hydrocarbons, silicone oils and greases, water up to approx. +80 ͦ C.
Flexseal NBR is not resistant to aromatic and chlorinated hydrocarbons, fuels with a high aromatic content, polar solvents, glycol-based brake fluids and flame-retardant pressure fluids HFD.
The ozone, weathering and aging resistance of Flexseal NBR is low. In the majority of applications, e.g. when the material is wetted with oil, the low ozone, weathering and aging resistance does not have a negative effect.
Flexseal NBR is also available as a fabric reinforced version. Cotton or synthetic fibre fabrics can be used as the basis for rubber-fabric materials. Cotton fabric is used as standard for hydraulic seals. Outside the standard, a whole range of other types of fabric and almost all elastomers are available for impregnation.
Seal Flexseal FKM – fluorinated rubber
Flexseal FKM materials are characterized by their very high temperature and chemical resistance. In addition, the very good resistance to aging and ozone, the very low gas permeability (and thus good suitability for use in a vacuum) and the self-extinguishing fire behavior are also worth mentioning.
The FKM standard sealing material shows very good resistance properties in mineral oils and mineral greases, aliphatic, aromatic and chlorinated hydrocarbons, fuels, flame-retardant pressure fluids HFD and many organic solvents and chemicals.
In addition to the standard FKM materials, various special compounds are available, which are tailored for special sealing applications due to the different composition of the polymer chains and varying fluorine contents (65% to 71%).
FKM is generally not resistant to hot water, steam, polar solvents, glycol-based brake fluids and low-molecular organic acids.
Gasket material Flexseal EPDM – ethylene-propylene-diene rubber
EPDM materials generally show good resistance to hot water, steam, aging and chemicals as well as a wide thermal application range. They are used in many general sealing applications. They are divided into sulphur and peroxide cross-linked grades, whereby the peroxide EPDM compounds are thermally more resistant and show a significantly lower compression set.
EPDM has good resistance to hot water and steam, detergents, caustic soda and potash solutions, silicone oils and greases, many polar solvents, many diluted acids and chemicals. Special qualities are recommended for glycol-based brake fluids.
EPDM materials are absolutely incompatible with all mineral oil products (lubricants, fuels).
The temperature application limits of the Flexseal EPDM sealing material are – 45 ͦ C to +130 ͦ C (- 50 ͦ C to +150 ͦ C peroxide crosslinked).
Sealing material Flexseal VMQ – silicone rubber
Silicone rubbers are characterized in particular by their wide thermal application range and excellent resistance to ozone, weathering and aging. The mechanical properties of silicone are rather low compared to other elastomers. However, silicone types reinforced with glass fiber are available which are mechanically much more resilient than pure silicone sheets. In general, silicone materials are physiologically harmless, i.e. they are used in food-related and medical areas, among others.
The silicone standard material can be used in the temperature range from – 55 ͦ C to +200 ͦ C and is resistant to water (up to 100 ͦ C), aliphatic motor and transmission oils, animal and vegetable oils and fats.
Flexseal Silicone is generally not resistant to fuels, aromatic mineral oils, water vapor (briefly up to 120 ͦ C possible), silicone oils and greases, acids and alkalis.
Sealing material Flexseal TPU – Thermoplastic Polyurethane
Flexseal TPU materials belong to the group of thermoplastic elastomers (TPE’s). The strength of TPU’s lies in the combination of its good properties, both physical and chemical, as well as processing and economic. TPU is produced as standard on thermoplastic injection moulding machines and has been established for many years in sealing technology, especially in hydraulic applications.
TPU materials stand out from classic elastomers due to their significantly higher mechanical strength. Other outstanding material properties include high abrasion, wear and extrusion resistance, high compressive strength and high tear and tear propagation resistance.
The TPU material shows good flexibility (even in the upper hardness range) in the temperature application range from -40 ͦ C to +100 ͦ C and very good resistance to aging and ozone. TPU is well suited for use in mineral oils and greases, hydraulic oils H, HL, HLP, silicone oils and greases, flame-retardant pressure fluids HFA and HFB and water up to 50 ͦ C as well as pure aliphatic hydrocarbons.
Gasket material Tecfilm PTFE – Polytetrafluorethylene
PTFE is a fluorinated plastic. PTFE has a number of positive properties that have become indispensable in sealing technology. It is characterized by its almost universal resistance to chemicals, the wide temperature application range from -100 ͦ C to +250 ͦ C, an extremely low coefficient of friction and the resulting very good sliding properties, no stick-slip effect, special rigidity and almost unlimited resistance to ozone, weathering and aging. Almost all known hydraulic media, lubricants, chemicals and solvents cannot harm PTFE.
Only elementary fluorine and alkali metals attack it at high temperatures and pressures. Pure PTFE does not contain any extractable substances that could migrate and have an unfavorable effect on adjacent materials. It is therefore physiologically harmless and also particularly suitable for food, pharmaceutical and medical applications. PTFE is not flammable and therefore does not pose any additional danger in case of fire.
PTFE is not or only slightly elastic. Therefore, PTFE sealing elements are activated by elastic preloading elements in the form of O-rings or stainless steel springs.
However, PTFE also has certain disadvantages, such as the tendency to cold flow or creep of pure PTFE under pressure load. However, these weaknesses are compensated for in the sealing compounds by the addition of fillers. Fillers, such as bronze-filled compounds, give PTFE the ability to adapt to most operating conditions.
Gaskets with aramid fibers
Aramids are organic synthetic fibers that are characterized by special properties. In the form of gaskets, they are particularly suitable for use at higher temperatures, under pressure and for liquid media.
Aramid fiber gaskets are characterized by high tensile strength, high pressure resistance. They are heat and fire resistant and have good sealing properties as well as excellent chemical resistance. Gaskets with aramid fibers are available in a variety of combinations, each with its own property profile.
Our aramid fiber gaskets meet the requirements of the DVGW (German Technical and Scientific Association for Gas and Water) for drinking water approval. This makes them ideal for use in water pipes.
Depending on the region and requirements, we can supply material with different approvals (KTW, W270, WRAS, ACS).
The post Gaskets: important components appeared first on Dr. Dietrich Müller GmbH.
We had to bulldoze a building to make room for 224 units of affordable housing!
The Mustard Seed’s affordable housing development will be a 12-storey, mixed-use building
that will include 224 studio and one-bedroom apartments, as well as parking, street-level retail
services and one floor of administration and programming. In a city-wide context, the building
represents a critical component of Calgary’s 10-Year Plan to end Homelessness, which aims
to provide housing for 1,500 chronically and episodically homeless by 2014.
This is the "clean" PCB, as seen through the magnifying glass.
The idea is to join the dots... placing the right components in between. Luckily there's always a shema printed on the reverse of the PCB ;)
I went through my collection of metal and plastic buttons and picked out a few vintage treasures to use in a new jewelry piece.
Vacuum tubes, resistors, diodes, a Tube Screamer guitar pedal, transistors, terminal strips and more!
Pensando en mejorar la educación a distancia, que tiene un gran componente virtual, UNIMINUTO Sede Cundinamarca llevó a cabo el primer Encuentro Sobre Innovación Tecnológica para la Educación, un encuentro dirigido principalmente a los profesores de la metodología distancia de la Sede.
A closeup of one of the new styles of pewter pendants. There is a bail at the top for a chain or cord.
The tubes have a trapezoidal shape that better matches the shape of your fireplace, allowing more heat exchanger to snugly fit.
It works in masonry and zero-clearance
fireplaces, as well as with gas logs or gas starters. You can use a cardboard
box of this size to test the fit into your fireplace.
The most elegant, well crafted,
customizable, and functional Heat Exchangers at the most reasonable
cost. Turn your fireplace into a furnace with the ultimate blend of
eye pleasing form with function. These high quality fireplace Grate
Heat Exchangers are built to last.
When you use our Grate Heat Exchanger
in an open fireplace, you will realize a saving on your heating costs
and the amount of firewood. With one of these you can extract a
larger percentage of the heat wasted and going up your chimney. Our
Heat Exchangers are designed with the greatest surface area to
capture and move into your home the highest percentage of the BTU
heat generated by your fire.
Our volume of sales and positive
feedback speaks for itself!
We have grates that have been in
operation since 2000 and no customer has reported burn through.
All our products are made with fully
welded uncoated non-galvanized structural grade industrial carbon
steel, and UL certified electrical components.
We use 100% renewable wind and hydro
electricity in our shop, and when possible, we use re-purposed and
recycled steel.
Here is how it works:
Our all steel design uses several
perfectly sized heavy duty thick wall tubes for maximum heat
exchanger surface area, superior airflow volume, minimum burn
through, and maximum combustion area volume. The tubes are welded
together forming a channel that is filled with cool home air. The
tubes then heat the air as it passes through them. Hot air is then
blown back into the your home with velocity. This adds conduction
from the hot coal coals and convection from the flame, heating to the
radiant heat of a fireplace, recovering otherwise lost energy or BTU
from the embers and flame of your fire.
The AC fans plug into a standard 110
VAC wall outlet (DC optional for solar panel, wind, solar cell, photo
voltaic cell off grid or grid tie applications), they are quiet
running at a measured 50 db or less decibels, and rated at 100 CFM
each. With the option of a variable speed fan control when mood is
more important than heat output you can reduce the background hum of
our heat exchangers in operation for the perfect ambiance.
Customers have observed how the warmth
generated by these Heat Exchangers can circulate to the adjoining
rooms in your home. A customer sent us many thanks when our grate
prevented the freezing of his pipes in -20 weather when his natural
gas furnace broke and the part was over a week away. This serves to
increase the comfort of your entire home, conserve the amount of wood
you burn, and nearly eliminate the need for other expensive methods
of climate control such as electric heaters, heat pumps, corn or
pellet stoves, and central air oil or gas furnaces.
Production time? We normally keep these
standard sizes in stock and ready for immediate shipping.
First in line is first in time, the
sooner you order your Fireplace Grate Heater, the sooner you can
start saving on the heating bill!
6.novembrī Ādažos notika mācību „Steadfast Jazz” viesu un preses diena, kuru apmeklēja NATO ģenerālsekretārs Anderss Fogs Rasmusens, kā arī Latvijas prezidents Andris Bērziņš, Lietuvas prezidente Daļa Grībauskaite un Igaunijas prezidents Tomass Hendriks Ilvess.
Mācības, kurās piedalās teju visas NATO dalībvalstis, kā arī partnervalstis - Somija, Zviedrija un Ukraina - norisinās Baltijas valstīs un Polijā. Latvija, kurā atrodas NATO Reaģēšanas spēku vadības štābs, būs galvenā komandvadības mācību norises vieta, savukārt Polijā norisināsies lauka vingrinājums. Ādažu bāzē ieradušies apmēram 400 karavīru no Apvienoto spēku pavēlniecības Brunsumā.
Foto: Gatis Dieziņš, Normunds Mežiņš, RJC
On November 6 NATO Secretary General Anderss Fog Rasmussen, President of Latvia Andris Berzins, President of Lithuania Dala Gribauskaite and President of Estonia Tomas Hedrik Ilves visited the exercise "Steadfast Jazz 2013" in Adazi, Latvia.
Exercise Steadfast Jazz 2013 is taking place from 1-9 November in a number of Alliance nations including the Baltic States and Poland. The purpose of the exercise is to train and test the NATO Response Force, a highly ready and technologically advanced multinational force made up of land, air, maritime and special forces components that the Alliance can deploy quickly wherever needed. The Steadfast series of exercises are part of NATO’s efforts to maintain connected and interoperable forces at a high-level of readiness.
Photo: Gatis Diezins, Normunds Mezins, RYC
made with electronic components from a broken cd player (Flagstaff, AZ) and copper wire
95% recycled
june 2010
First the image was converted into a set data vectors in format (x,y,r,g,b), one for each pixel in image, its coordinates x and y and the values on red, green and blue channels.
Then this 5D-data was projected to 4D-space using principal component analysis, e.g. the information in the directions of the lowest eigenvalue was removed. The resulting image was rebuilt based on that reduced information.
Three separate components were made: just cooked tender sago pearls, a mango soup that consisted of numerous Filipino mangoes (maybe 8?) and a splash of evaporated milk (touch of lemon, sugar syrup, water and mago juice), cubes of mango and careful pulp separation from half a large pomelo (I like lots of texture in mine). This was a not too sweet but very satisfying finish to a great and hearty meal. Well worth the hours of work.
Hundreds of electronics shops, ranging from tiny one-man stalls specializing in a particular electronic component to large electronics retailers, line the main Chuo Dori street and the crowded side streets can be found all around Akihabara. However it this this large The Yodobashi electronics mega store which dominates Akihabara. This young ladyhere is promoting Casio products. I took this picture while walking as I did not want to distract of disturb the young lady during her presentation, consequently this picture turned out rather blurred unfortunately. Although the Yodobashi mega store seen here offers everything electronic under one roof, the other shops in the neighbourhood offer everything from the latest computers, cameras, televisions, mobile phones, electronics parts and home appliances to second-hand goods and electronic junk. (Tokyo, Japan, Apr/ May 2019)
Fuse box, solar charger, disconnects for 12V and solar.
120V breakers, battery charger.
Detailed information about my DIY Squardrop camping trailer build with helpful tips on my website:
Kunwar Bros & Co. is a premium manufacturer and supplier of very high quality stainless steel components used for Architectural, Builder and Construction Applications. We are manufacturing products for many famous brand names around the world. We offer a comprehensive range of Architectural Builder's Hardware products. The range includes - Modular Railing, Stair Case Railing, Hand Rail Bracket, Glass Connectors, Door Handles, Pull Handles, Cabinet Fittings, Bathroom Fittings, Anchor Fasteners, Anchor Rods and many more.Our Products are manufactured all under one roof in order to exercise Total Quality Control . We work as an exclusive, high quality manufacturing base for companies in Europe and USA which specialize in developing, producing and marketing products in their respective markets. Our specialization in Manufacturing / Fabrication and investment casting has enabled us to reach out to a widespread network of clients across the Domestic and International Market.
NOTE : All type of Railing( Atrium Railing,Balcony Railing,Balustrade Railing,Glass Railing,Hand rail,Wall mount Railing,Staircase Railing, Spiral Staircase, SS Gate)
Contact Us:
Kunwar Bros & Co.
Rajendra Singh
C-114, Sector-10,
Noida-201301 (U.P.)
Tel -0120 3060548
Mob 9818583935 / 9911968875/9871632860
kbsnco@hotmail.com
Multiple Star Sigma Orionis (Struve 762) is at the center of the image. Components A and B are too close for this imaging system to resolve. At magnitude 8.79, component C is too faint to be seen in this short exposure image. However, C's general position is labeled. Component D is just noticeable protruding from A, but is not fully resolved. Component E, just to the left (east) of A, is clearly split at this scale. E is also a variable star (V1030 Ori). [1,2]
Sigma Orionis (AB), the primary star of the system, is visible to the naked eye even from some light polluted downtown Oklahoma City locations. It lies just below (southwest) of Alnitak, the lowest (southernmost) star of Orion's belt. Visually, components AB, C, D and E should all be split easily at about 100-200X with a small (150mm) telescope.
The Washington Double Star Catalog shows the separation between stars AB and E as 41.2 arc seconds. [3] It lists AB as magnitude 3.73 and E as magnitude 6.34.
Struve 761, another multiple star system, is visible toward the upper right (northwest) of Sigma Orionis. The southernmost member of 761 is a binary system that is not quite resolved into separate components in this image.
Both of these multiple star systems are part of the Sigma Orionis Cluster. The Sigma Orionis Cluster is between 350 and 500 light years away and is composed of very young stars in the age range of two to three million years old. [4]
Washington Double Star Catalog Data
Sigma Orionis (Struve 762)
AB,C Separation: 10.9 arc seconds
AB, C Position Angle: 238 degrees
AB, C Magnitude: 3.73, 8.79
Epoch: 2006
AB, D Separation: 12.5 arc seconds
AB, D Position Angle: 84 degrees
AB, D Magnitude: 3.73, 6.56
Epoch: 2007
AB, E Separation: 41.2 arc seconds
AB, E Position Angle: 61degrees
AB, E Magnitude: 3.73, 6.34
Epoch: 2007
Image Details
Orientation is only approximate (north up, east left).
Date: January 19, 2009 03:16:42 UT
Telescope: Meade LXD75 203mm f/4 Schmidt-Newtonian
Camera: Meade DSI1
Image: Stack of 6 images at 2 seconds each. LRGB combined in AIP4WIN. Processed in AIP4WIN and Photoshop.
ID: SigOri3aLRGBRot011909BLbl
References
1. Groote, D., Hunger, K., 1982, Shell and Photosphere of Sigma Ori E: New Observations and Improved Model, Astronomy & Astrophysics, 116, 64-74, articles.adsabs.harvard.edu/cgi-bin/nph-iarticle_query?19...
2. American Association of Variable Star Observers (AAVSO), The International Variable Star Index (VSX), www.aavso.org/vsx/index.php?view=detail.top&oid=24093 (last accessed January 21, 2009).
3. Mason, B.D., Wycoff, G.L., Hartkopf, W.I., The Washington Double Star Catalog, U.S. Naval Observatory, Washington, D.C., ad.usno.navy.mil/wds (last accessed January 19, 2009).
4. Sherry, W.H., Walter, F.M., Wolk, S.J., Adams, N.R., 2008, Main sequence fitting to the Sigma Orionis Cluster, Astronomical Journal, 135, 1616-1623,
arxiv.org/abs/0801.2585 (e-print).
NON-NUCLEAR COMPONENT STORES BUILDING 60 –
The function of the non-nuclear component stores was to hold the high explosive part of the bomb and its outer casing. The casing could probably be split into two units, the tail and forward part containing the high explosive and electronics. The bombs, minus their fissile components, were housed in three almost identical stores buildings 59-61, known as Storage Building Type 'D-D'. These are arranged in an arrowhead pattern, and are accessed from the internal loop road, and are all surrounded by 14ft 6in high earth traverses, revetted by a reinforced concrete retaining wall against the roadway.
The western store, building 59 was gutted by a fire during the 1980's and has subsequently been demolished. Its floor plan remains visible on the remaining concrete floor slab. The two remaining stores, buildings 60 and 61 are rectangular in plan, and are constructed from reinforced concrete columns and beams. Internally there are two rows of columns, 13in², which support the roof beams, 2ft by 9in, which carry the 9in thick reinforced concrete roof slab which is covered with bituminous felt. The rainwater gutters and down pipes are cast asbestos.
The wall sections are filled with 18in by 9in by 9in precast concrete blocks, internally the main storage area measures 190ft 2½in by 60ft. It is divided longitudinally into eleven 17ft by 3ft bays and cross ways into three bays the outer bays measure 17ft 6in and the central bay is 25ft wide. The maximum clear internal height was 12ft from the floor to the underside of the roof beams. The floor is surfaced with a hard gritless asphalt with the patent name 'Ironite'. The walls are painted pale green colour and the ceiling cream. in store building 61 the bay letters 0, N, M, and L are visible on the rear columns on the eastern side, suggesting the store was divided into 22 bays along the outer walls.
Abutting on to the front of the stores, and flanking the entrances, are plant and switch rooms, which originally contained heating and air conditioning plant to maintain a stable environment within the stores. A raised air extract duct is placed asymmetrically on the roofs of the stores. Entry into the stores is through a 10ft wide door opening with 12ft high doors. In the rear wall of the stores is a single door width, outward opening emergency exit. The first nuclear weapon the store was designed to hold was relatively large, a ''Blue Danube'' bomb measured 24ft in length and weighed 10,000lbs.
The problems of handling such large objects are reflected in the provision of substantial lifting gantries at the entrance to each store. Two variants are found, the simplest, exemplified by the middle store building 60 comprises a straight gantry. Over the roadway the gantry is supported by four 24in by 18in reinforced concrete columns, which support two 51in by 24in reinforced concrete beams. The upper beams of the gantry taper towards the entrance to the store where they are suppurted by two reinforced concrete columns. On the underside of the gantry is attached a 20in by 6½in rolled steel joist runway beam which runs to the entrance to the building. This was originally fitted with a 10 ton hoist. The gantry is covered by asbestos sheeting to provide a dry working area.
On the eastern and western stores the gantries were set at 30° to the front of the stores. In this variant an extra set of columns was placed at the 30° dogleg. Internally there is no evidence for a runway beam, so it presumed the bombs were lifted off a road transporter and loaded onto a bomb trolley for storage. It is not known how many bombs were kept in each store, or if the tail units were separated from the front part of the bomb for storage. Subsequent to the site being relinquished by the RAF a central corridor has been created in the stores by the insertion of breeze block walls. Doors in these walls give access to workshops along either side of the buildings. External windows have also been inserted in some of the bays.
Information sourced from English Heritage.