When deciding what diaphragm type to use the following factors need to be taken into account:
Chemical properties of the media
Temperature of the media
Pressure to be used
Nitrile Rubber (NBR / Buna-N)
The chemical name for Nitrile rubber is Nitrile Butadiene Rubber. However, most commonly it is referred to as NBR or Buna-N. NBR is probably the most common solenoid valve seal material and it is considered the standard material for neutral fluids by many. NBR is also the standard material for O-rings.
NBR can stand working temperatures from -10 °C up to approximately 90°C on a continuous basis, and higher temperatures intermittently. NBR resists aging caused by heat very well. NBR's resistance to sunlight is very poor however abrasion and tear resistance of NBR is very good.
NBR seals are most commonly used with the following media:
EPDM Rubber
EPDM Rubber
EPDM stands for Ethylene Propylene Diene Monomer rubber. EPDM solenoid valve seals are well suited for use with hot waterand steam due to EPDM's excellent resistance to heat. The working temperatures of EPDM is approximately between -10 °C to +140 °C. EPDM is unsuitable for use with most oils and fuels. WRAS approved EPDM diaphragms are also available.
Viton® (FKM) is a brand name for the Fluoroelastomer manufactured by DuPont. It is well known for its excellent heat resistance, and is suitable for use with oils, combustible gases,fuels, solvents. The working temperatures range from -10°C to + 140 °C. FKM seals are most commonly used with the following media:
Any further information pls contact Suzy.
Welcome your inquiry.
Suzy Wei,
Sales Manager-Trade Dept.
E. suzy@tjswks.com | M.+86 13662169442(whatsapp,skype,wechat)
