IFAN PEX Brass Press Fittings

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-Coded Material Identification of Sealing Components

Seal coloration serves as a standardized visual identification mechanism to distinguish the core polymeric materials of sealing elements in brass press fitting systems. Conventionally, black-colored seals are fabricated from ethylene propylene diene monomer (EPDM), while yellow-coded seals adopt hydrogenated nitrile butadiene rubber (HNBR) as the base material, which is specifically engineered for gas pipeline application scenarios. Complementing the color-coding system for seals, professional-grade brass press fittings are equipped with distinct, unambiguous color markings to facilitate rapid material verification and on-site installation identification.

Comprehensive Durability Performance Analysis

Brass press fitting systems integrate three high-performance sealing materials, namely EPDM, HNBR and fluoroelastomer (FKM), each possessing tailored service adaptability and differentiated long-term service lifespans corresponding to distinct operating environments. EPDM sealing materials exhibit exceptional compatibility with water-based pipeline systems, boasting a service lifecycle ranging from 20 to 30 years under standard operating conditions. In contrast, HNBR seals deliver superior chemical stability and gas resistance, making them the optimal selection for gas transmission pipelines with a sustainable service life of 20 to 25 years. For extreme high-temperature operating scenarios, FKM seals demonstrate outstanding thermal stability and structural reliability, achieving a maximum service duration of up to 30 years.

The selection of sealing materials constitutes a critical determinant of the overall operational durability and service longevity of brass press fitting assemblies. Precise matching of seal material properties with the functional parameters of the target pipeline system enables these fittings to maintain stable sealing performance and structural integrity over multiple decades. Reasonable material adaptation based on system operating medium, temperature and service conditions is therefore essential to maximize the long-term operational reliability and service lifespan of the entire piping system.