Rubber Valve Seat for Butterfly Valve
Specifications
Design Standard |
MFG |
Testing Standard |
MFG |
Temperature |
-20℃~120℃(depends on the rubber material) |
Rubber Material |
EPDM, NBR, HNBR, SBR, NR, CR, CSM, KFM, Silica, PU |
Seat Type |
Hard backrest & Replaceable |
Hardness |
Shore A 70±2 |
Medium |
Water, oil, gas, weak acids, weak bases (depends on the rubber material) |
Certificates |
ISO9001, CE, WRAS, ACS |
Dimension
Size |
Ф C |
D |
DN40 |
72.1 |
37.5 |
DN50 |
76.3 |
46.1 |
DN65 |
89 |
49.1 |
DN80 |
103.9 |
48.4 |
DN100 |
135 |
55.3 |
DN125 |
159 |
58.8 |
DN150 |
188.4 |
59.5 |
DN200 |
238 .2 |
64.1 |
DN250 |
292 4 |
72.5 |
DN300 |
344 2 |
81 |
DN350 |
375.1 |
80 |
DN400 |
439.2 |
106.5 |
DN450 |
490.1 |
118.5 |
DN500 |
535 |
135 |
DN600 |
654.2 |
156 |
DN700 |
744 |
169 |
DN750 |
794 .4 |
173.5 |
DN800 |
849 9 |
195 |
DN900 |
947 |
211 |
DN1000 |
1053 |
224 |
DN1050 |
1124.4 |
261 |
DN1200 |
1264.1 |
286 |
Characteristics of sealing rubber
No. |
International Name |
Material Function |
Suitable Media |
Media Temperature |
1 |
EPDM |
Oxidation resistance, ozone resistance, erosion resistance, aging resistance |
Mineral acid solutions, mineral alkaline solutions, liquefied organic salts, alcohol, water, seawater |
-20℃~110℃ |
2 |
EPDM-HT |
Oxidation resistance, ozone resistance, erosion resistance, aging resistance, high-temperature resistance |
Ultra-high temperature water |
-10℃~130℃ |
3 |
EPDM-GJ |
Oxidation resistance, ozone resistance, erosion resistance, aging resistance |
Food products, drinking water |
-5℃~110℃ |
4 |
NBR |
Oil resistance, wear resistance |
Mineral oil, vegetable oil, natural gas, solid vegetable oil, non-cyclic aromatic hydrocarbons, animal fats, air |
-10℃~90℃ |
5 |
HNBR |
Oil resistance, wear resistance, high-temperature resistance, acid resistance, alkali resistance, solvent resistance |
Mineral oil, vegetable oil, natural gas, solid vegetable oil, non-cyclic aromatic hydrocarbons, animal fats, air, mineral acid solutions, mineral alkaline solutions |
-55℃~180℃ |
6 |
CSM |
Ozone resistance, aging resistance, corrosion resistance, oil resistance, flame retardancy |
Mineral acid solutions, organic and inorganic acids, oxidizing substances |
-10℃~80℃ |
7 |
VITON/KFM |
High-temperature resistance, oil resistance, chemical erosion resistance |
Acids, fats, hydrocarbons, vegetable oil |
-5℃~180℃ |
8 |
NR |
Excellent resilience, insulation, water resistance, and plasticity; oil resistance, alkali resistance, heat resistance, cold resistance, pressure resistance, wear resistance |
Water, alcohol, wear resistance, ketones, food products |
-10℃~60℃ |
9 |
CR (Neoprene) |
Good physical and mechanical properties; oil resistance, heat resistance, flame resistance, sunlight resistance, ozone resistance, acid resistance, alkali resistance, chemical reagent resistance |
Water, seawater, dilute acids and alkalis with a concentration below 20% |
-10℃~100℃ |
10 |
Silica |
Non-toxic, odorless, high-temperature resistance, low-temperature resistance |
Low-temperature and high-temperature resistance, food products |
-30℃~150℃ |
11 |
High-Tear Silicone Rubber |
Non-toxic, odorless, high-temperature resistance, low-temperature resistance, aging resistance, wear resistance |
Low-temperature and high-temperature resistance, food products |
-30℃~150℃ |
12 |
SBR |
Excellent resilience, insulation, water resistance, and plasticity; oil resistance, alkali resistance, heat resistance, cold resistance, pressure resistance, wear resistance |
Water, alcohol, weak acids, weak alkalis |
-10℃~100℃ |
13 |
PU |
Oil resistance, wear resistance, low-temperature resistance, aging resistance |
Solid powders |
-5℃~80℃ |
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