EPDM is the primary material for water
Brass Press Fittings commonly use EPDM for water systems. EPDM is an ethylene propylene rubber. It resists hot water and chemicals well. Example: EPDM works reliably in heating systems.
HNBR for gas systems
Gas applications require HNBR (hydrogenated nitrile). It resists hydrocarbons and gas permeation. EPDM is not suitable for gas. Brass Press Fittings with HNBR are used for gas pipelines.
FKM (Viton) for high temperatures
FKM withstands temperatures up to 200°C. It resists oils and aggressive fluids. It is used in demanding environments. Brass Press Fittings with FKM work in extreme conditions.
EPDM durability at moderate temperatures
EPDM lasts 20-30 years at 70°C. It resists ozone and aging well. Brass Press Fittings with EPDM are reliable for water.
HNBR durability in gas environments
HNBR lasts 20-25 years in gas service. It does not swell from hydrocarbons. Brass Press Fittings with HNBR are durable for gas.
FKM durability at extreme temperatures
FKM lasts up to 30 years at high temperatures. It resists aggressive chemical attack. Brass Press Fittings with FKM suit harsh conditions.
Example: heating system with EPDM
Water is heated to 70°C. EPDM seals work for 20 years. Brass Press Fittings with EPDM are reliable. Example: decades of trouble-free heating.
Example: gas pipeline with HNBR
Gas at 2 bar pressure. HNBR seals remain intact. Brass Press Fittings with HNBR are safe. Example: gas without leaks for 20 years.
Example: steam system with FKM
Steam at 150°C. FKM maintains its elasticity. Brass Press Fittings with FKM withstand steam. Example: a reliable steam system with durable seals.
Shore hardness of seals
EPDM hardness is 70-80 Shore A. HNBR is 75-85 Shore A. This ensures proper sealing. Brass Press Fittings use standard hardness levels.
Color coding of seals
Black seals are typically EPDM. Yellow seals are HNBR for gas. Color helps identify the material. Brass Press Fittings have clear color markings.
Final durability summary
Brass Press Fittings use EPDM, HNBR, or FKM seals. EPDM suits water and lasts 20-30 years. HNBR suits gas and lasts 20-25 years. FKM suits high temperatures and lasts up to 30 years. Seal material choice directly affects durability. Brass Press Fittings with the right seal last decades. Example: match the seal to your system for maximum life.