Searching for the best solution for Chemical industries? Zhongguan, excepting regular martials seat such as NBR, EPDM., also is FKM Seat butterfly valves manufacturer. With full processes quality control, and aim to provide terrific valves around world. Its compression set is ≤18% (tested according to ISO 815 standard), making it particularly suitable for butterfly valve systems in environments with alternating hydrocarbon media and acidic/alkaline conditions.
FKM Seat butterfly valve in industrial-grade valve manufacturing systems, fluorocarbon elastomer (designated FKM according to ASTM D1418) has become the preferred engineering material for dynamic sealing interfaces due to its unique molecular structure. This polymer maintains ASTM D2000 M6EE907 certification for chemical inertness within a working temperature range of -18°C to 150°C (in FKM seat butterfly valve).
The core advantages of FKM materials
1. Fluoroelastomer (FKM) is a fluorine-containing synthetic elastomer that is used as a seat material for FKM seat butterfly valve, and its properties include:
2. Chemical resistance: Resistant to strong acids (such as 98% sulfuric acid, 37% hydrochloric acid), strong alkalis (50% NaOH), hydrocarbon solvents and ozone, and the corrosion resistance level is better than NBR/EPDM;
3. High temperature adaptability: continuous working temperature range -20°C~180°C, short-term resistance to 200°C thermal shock (This is only for pure rubber, when used for butterfly valve seats are usually the maximum temperature is 150°);
4. Low permeability: the gas permeability is only 1/5 of NBR, which prevents the expansion and failure of the valve seat caused by medium penetration;
5. Mechanical stability: hardness range 70~90 Shore A, compression set rate≤15% (ASTM D395 test).
6. The seat life of FKM seat butterfly valve can reach 8~12 years, which is more than 3 times that of ordinary rubber valve seats
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