Distinct advantage over homogeneous diaphragms

Fabric reinforced diaphragms utilize a layer of an engineered fabric material as part of the diaphragm construction. This layer of fabric give tremendous design flexibility. A very thin-walled diaphragm can withstand high pressures while remaining very flexible and responsive to minor pressure variations. A fabric reinforced diaphragm limits the stroke and provides a frictionless seal. These diaphragms generally cost less, have more tolerance range, and do not require hardened super finishes or lubrication. The function of a diaphragm is the most important factor in its design and manufacture. Simple diaphragms move from one position to another, such as pressure switches and solenoid valves. Diaphragms can be used as shock absorbers as in a dash pot or as dampening devices in pulsating systems. Diaphragms can also be used as barriers between fluids and gases, such as in a pressure drop on the fluid side.


Fabrid reinforced diaphragms are used in pumps, such as automobile fuel pumps, hand pumps, and diaphragm air compressors. In these cases an outside mechanical force is actuating the diaphragm. This functions to displace a volume of media. In the case of a pump the diaphragm creates a low pressure area causing the fluid or gas to move into this area. In all the above cases the function of the diaphragm will generally be the determining factor when considering the type of construction, the material composition, fabric design (weave/knit), and the type of polymer.


Supported diaphragms are produced from a wide variety of fabric, varying strength, weights, and weaves. The fabrics themselves range from natural fibers, such as silk and cotton to the man-made fibers and high strength arimids. The elastomeric coatings can be put on both sides of the fabric in equal thickness or an unbalanced coating. Many applications require elastomeric coatings on only one side such as applications where the pressure differential is in one direction. When knit fabrics are employed, the coating is usually on one side and the same side as the pressure. This allows the fabric to support the coating on both sides for flat diaphragms.


The selection of the fabric substrate, in terms of strength, weight and flex life will greatly depend on the application. Fabric reinforced diaphragms have a distinct advantage over homogeneous diaphragms. Supported diaphragms have less tendency to stretch under pressure conditions. Most importantly, fabric substrate takes all of the stress from the rubber leaving the rubber to work in the least stress conditions.


Darcoid Nor-Cal Seal offers a wide range of elastomer compounds including NBR, EPDM, neoprene, epichlorohydrin, silicone, fluorosilicone and fluorocarbon, as well as polyester, nylon, high temperature nylon and silk fabric reinforcements. Fabric reinforced diaphragm seals are an ideal solution where accurate, consistent response is required for changes in hydraulic or pneumatic pressures, maintaining zero leakage, and offering almost zero friction without the need for lubrication. Darcoid Nor-Cal Seal supplies fabric reinforced diaphragms for usage in applications in many industries including automotive, aerospace, semiconductor, medical, instrumentation and process control industries, they offer an inexpensive solution to design problems.

The uniqueness of lip seals

              A lip seal is a rotary seal incorporating a deflected lip seal geometry. Anti-rotational devices such as flanges and O-rings are often utilized to prevent the seal from rotating with the shaft. Standard and custom sizes are available with a wide selection of PTFE materials. Lip seals are suitable for sealing corrosive and abrasive media. A wide range of geometries and materials are available, depending on specific application requirements. Lip seals are often used on motors and compressors and other components with high speed rotary shafts due to their ability to resist wear even while pressurized.

The most common lip shape is the chamfered or back-beveled design and is available with the V and C Series spring types. This design allows for ease of installation and permits lubrication to nest under the lip and feed through in reciprocating dynamic applications. The result is a microscopic film of lubrication that increases seal and hardware service life. Since the footprint (contact point) of a chamfered lip is a single point, all of the sealing force is concentrated on that point, yielding the highest sustainability and lowest friction.

Applications often involve medias with abrasive particles that can get caught between the seal lip and the mating hardware. This increases wear to both the seal and the mating surface. To prevent particles from accumulating, the scraper lip design is available with all three spring types. The scraper lip contact point is positioned directly over the load point of the spring in each design for maximum scraping action. The scraper lip can be positioned on the ID, OD or both. The scraper lip also stays in place better in a stepped gland where the step is not very large.

The beaded shape contacts the surface in much the same way as an O rings, and is available with the V and H Series spring types. Similar to the chamfered lip, it is easy to install and helps to lubricate the reciprocating sealing surface. In fact, the beaded lip yields a film of oil that is slightly thicker than that of a chamfered lip, making it advantageous for applications with rapid reciprocating motion. Darcoid Nor-Cal Seal is an excellent supplier of lip seals.

Darcoid Nor-Cal Seal provides sealing solutions which are highly cost effective, have high production rate sourcing to the highest technologies. A single lip seal can play an important role in two directions' seal and is applicable for different seal media such as oil, water, gas, chemical medium and other mixed media. The uniqueness of these lip seals from the house of Darcoid Nor-Cal Seals makes the product reliable and sustainable.

Darcoid Nor-Cal Seal is a leading distributor of hydraulic seals. Darcoid Nor-Cal Seal has been providing standard and custom-made lip seals for a wide range of applications and industries for a long time as an industry leader and has been providing Hydraulic Seals for the Aerospace and Military markets where quality is of utmost importance.

High quality supporting accessories for your high-end machinery

Darcoid specializes in rendering rubber products, machinery supportive accessories and adhesives, Parker seals for flawless functioning of your machinery. Darcoid paves into various divisions like adhesives and sealants, rubber seals, composite seals, dynamic seals, EMI and RFI shielding products, Extruded products, gaskets, rubber sealing rings, medical components and equipment, molded shapes, O-rings, Sanitary, vacuum face seals and Hygienic seals, semiconductor seals, sheet and roll stock, thermal products divisions. Undertaking the task of enhancing the efficiency of machinery can be a piece of cake with the unique products offered by Darcoid. Darcoid maintains industry leadership by offering innovative, high quality supporting accessories for your high-end machinery.

Basically an O-ring is used to block a pathway that fluid or air may escape through. O-rings are usually put into a groove to hold them in place and then squeezed between two surfaces. When an O-ring is squeezed between two surfaces it shall be taking up the clearance and blocking the pathway that the fluid or air wants to escape through. After an O-ring is applied by squeezing, the rubber once again takes up its original shape. This is how the O-rings seal under low to no pressure. When pressure is applied to the system this also helps the O-ring seal by pushing the O-ring against the groove wall opposite the direction of the pressure and forcing it expand perpendicular to the direction it is being squeezed by the pressure.

Darcoid Nor-Cal Seal is an authorized distributor for Parker seals, O-rings and the likes. These seals have a wide selection of compounds that can meet your application requirements. A wide range of Parker compounds are offered by Darcoid which include Butyl, Chloroprene, PolyAcrylate, Ethylene Acrylate, Ethylene Propylene, Fluorocarbon, Fluorosilicone, High Performance Fluoroelastomers, Hydrogenated Nitrile, Nitrile, Perfluoroelastomer, Polyurethane, Silicone and Tetrafluoroethylene-Propylene.

 

Since O-rings can not be made exactly to their dimensions every time, manufactures are allowed to make them within range of their original dimensions. Variations in the rubber compound and in the manufacturing process cause slight variations in the shrink of the material and effect the finished size of the O-rings. O-rings are commonly made of rubber but they can also be made with plastic or metal. Several different type of rubber compounds exist on the market today because of the different temperatures, chemical exposures and environments that O-rings are subjected too. O-rings come in many sizes, hardness, elastomer and colors to suit various applications.

These O-rings are being widely in use in industrial sectors ranging from automotive to fluid power to semiconductor processing. Parker seals, O-ring products from rubber manufacturers and vacuum face seals of different grades and standards to support the needs of sustainability of your expensive machinery. Darcoid Nor Cal Seal has been serving various sealing and machinery aid needs since 1947. Darcoid Nor Cal Seal is a fabricator of Parker seals, O-rings and more of the likes. The endeavor has been serving as a global leader delivering excellent sealing and machinery aiding solutions.

Prime objectives of Emi shielding seals

The effect of the growth experienced in the electronic industry and the adverse use of electronic equipment in computations, communications, biomedical automation, space and many other reasons has resulted in electromagnetic interference. Commonly referred to by its initials EMI, this problem is bound to be severe in the near future, unless a method of control is arrived at.

The suppression of EMI should be a prime objective for anyone who is involved in this trade, and hence EMI shielding. This can be termed as the reduction of the electromagnetic field, in any given space by using barriers to block the field. These barriers are made of magnetic materials. There are various ways to apply shielding. Shielding is in this case applied to enclosures, isolating all electrical devices, and to cables to keep the wires safely from the surrounding where they run.

In a world that is becoming more and more dependent on electricity, and all its devices, there is need for protection of all the electrical equipment used in all places, both at home and work. EMI shielding sealing solutions are being used in countless devices in the office, home, factories as well as laboratories.

Despite the ever presence of EMI, many, engineers physicists, and other people involved in technology are puzzled by the basic elements involved and all the sealing materials that serve to protect electronic equipment.

Electromagnetic radiation is made up of electric and a magnetic field consists of two fields, electric and magnetic. The electric field is responsible for the production of forces, which are on the charge carriers in a conductor. When an electric charge is applied to the surface of a conductor, in brings in a current, which causes charge displacement within the conductor, cancelling the field applied inside, which causes the current to stop.

The common materials that facilitate EMI shielding seals include metal screen, sheet metal, and metal foam. Different positioning techniques are applied when one is shielding. During shielding, using these materials, one should be careful to make sure that any holes found on the mesh or shield are smaller, compares to the wavelength of radiation. This radiation is what is intended to be kept out, and if this is not adhered to, the enclosure or surface shielded will fail to approximate the conducting surface that is unbroken.

Darcoid Nor-Cal Seal, an endeavor that specializes in supplying all kinds of sealing solutions, offers a broad range of products in Electro Magnetic Interference shielding applications like EMI shielding and gaskets.These products work by containing or excluding electromagnetic energy in RF modules and components, waveguides and structural enclosures.

Darcoid Nor-Cal Seal is a world renowned manufacturer of sealing solutions and a wide range of accessories like EMI shielding seals and gaskets, die cut gaskets and spliced o-rings, and a distributor for the top manufacturers of seals, gaskets and rubber products. Darcoid is an expert in supply chain management and value added distribution services, resulting in high quality seals and good cost value solution for your company.