Eccentric : Eccentric means not having the same centre.
Elastomer ; A natural rubber or synthetic elastic flexible material used for the manufacture of valve O rings, seals, diaphragms and gaskets.
Elbow : An angled pipe fitting typically 45° or 90º that is connected to a pipeline system to change the direction of flow.
Electrical Connection : Solenoid coils are electromagnetic devices that convert electrical energy into a magnetic field. The electrical energy is supplied to the solenoid coil by either lead wires or by means of an electrical connector. The DIN43650 electrical connector is designed to fit directly onto the side of the solenoid coil with the power supply electrical wires entering the connector through a conduit entry point. There are a few sizes such as Form A 28mm square, Form b rectangular and mini Form C 9.8mm square.
Helpful hint: make sure the cable gland is tight fitting to the cable to prevent pulling free and that the cable enters the connector vertically i.e. upwards ↑ to prevent moisture or water ingress.
Electric Valve : An electric valve is a valve that is powered by electrical current such as an electric solenoid valve or an electrically controlled or motorised valve. Electrically actuated valves can be 12vdc, 24vdc, 48vdc or 12vac, 24vac, 48vac, 110vac, 220vac or 380vac and will draw different current (AMPS) according to their valve specification.
Emergency Seat Seal : Emergency seat seal obtains tight shut off in case of an emergency situation, a sealant can be injected into a specially designed groove in the seat rings to seal the valve closed.
EN161 Valves : EN161 is a general safety requirement as described in EN standards in which devices, solenoid valves, automatic gas safety shut off valve, slam shut valves, solenoid valve, automatic safety shut off valves or gas release valves have to guarantee a safe operation for Natural Gas, Mains Gas Burners, Gas Furnaces, Gas Appliances, Gas Heaters and Gas Steam Boilers.
End Bevel : End bevel is a weld end prepared for butt welding, as governed by ANSI B31.4 & B16.25.
End Connection : The type of connection at the connecting ends oor ports of a valve that allows the valve to be installed within a pipeline. Typical end connections would be weld end, flanged end, screwed end.
EPDM seals : EPDM known as (Ethylene Propylene Diene Monomer) is an elastomer seal that is a typical available option for most solenoid valves, and is the preferred choice for WRAS and Wrc solenoid valves for drinking water.
EPDM has good resistance to Heat, Ozone, Oxidising Chemicals, Up to Medium concentration Acids, Alkali's, Fire proof hydraulic fluids, most Ketone's and Alcohols, sunlight, abrasion and tearing.
EPDM has poor resistance to most oils and Fuels, Hydrocarbons, Aromatic and Aliphatic hydrocarbons, halogenated solvents and concentrated acids.
Equivalent : While there is no such thing as an 'exact equivalent' for most valves as any minor difference could be called into question, there are 'replacement or functional equivalents' where one item can be replaced by another to perform the same function. A replacement equivalent valve is one where important factors including form, compliance & key functional factors are equivalent, or in some cases exceed those of the original it replaces.
Erosion : The mechanical wearing away of a metal surface due to corrosion, fluid ingress or contamination which can be accelerated by solid particles.
Explosion Proof : The prevention of explosion by electrical components, through containment in special metal housings, An ATEX requirement for electrical devices, such as solenoids and switches, when exposed to a potentially explosive environments of gases or dusts. See ATEX.
Export Packaging : Strong packaging, cartons or crates required for the safe transportation of goods for export shipping. Includes sealing against a salt atmosphere or sea air freight shipping.
External Coating : External valve coating or painting applied to protect valves against various environments such as sea air, salt water, underground use and normal air exposure.