Overview for fire the next shot resilient seated gate valve in addition has the advantage that the outer elastic , and can be more visually shows valve opening , the opening and closing rapidly and reliably . So often used in fire protection systems and industrial ,usually installed in a high position from the ground . Widely It is used as regulating and intercepting device in liquid lines such as tap water, sewage, construction, petroleum, chemical, food, medicine, textile, electricity, shipbuilding, metallurgy and energy system.
Pressure test
|
Nominal pressure |
Strength test |
Water Seal / Upper Seal Test |
Gas seal test |
|
1.5 * PN (MPa) |
1.1 * PN (MPa) |
0.5-0.7 (MPa) |
|
|
1.0 |
1.5 |
1.1 |
0.6 MPa |
|
1.6 |
2.4 |
1.8 |
|
|
2.5 |
3.8 |
2.8 |
RRHX fire special rod seat flexible block main parts and components list of materials
|
Serial number |
Part Name |
Material |
|
1 |
Handwheel |
Malleable iron |
|
2 |
Stem nut |
Copper alloy |
|
3 |
Bracket |
Gray cast iron, ductile iron, cast steel |
|
4 |
Gland |
Ductile iron, cast steel |
|
5 |
Sealing ring |
NBR, EPDM |
|
6 |
Valve stem |
stainless steel |
|
7 |
Flange gasket |
NBR, EPDM |
|
8 |
gate |
Ductile iron coated EPDM or NBR |
|
9 |
Body |
Gray cast iron, ductile iron, cast steel |
RRHX Fire special rod seat flexible block main connection Dimensions : ( unit : mm)
|
DN |
50 |
65 |
80 |
100 |
125 |
150 |
200 |
250 |
300 |
350 |
400 |
450 |
500 |
600 |
|
L |
178 |
190 |
203 |
229 |
254 |
267 |
292 |
330 |
356 |
381 |
406 |
432 |
457 |
508 |
|
Hmin ( all off ) |
313 |
332 |
375 |
425 |
498 |
562 |
680 |
838 |
950 |
1010 |
1220 |
1280 |
1480 |
1665 |
|
Hmax ( fully open ) |
355 |
375 |
415 |
475 |
540 |
605 |
720 |
875 |
990 |
1050 |
1245 |
1310 |
1560 |
1750 |
