info@welcovalve.com
TEL: 86-577-67279881
FAX: 86-577-67279880
+86-15067717767
Skype: welcovalve
We are professional to supply pressure seal bonnet gate valve. Our gate valves are primarily used for stop valves fully pened or fully closed. with features of OS&Y, rising stem, flexible Wedge, bolted bonnet, welded seat ring.
Standard specification.
Wedge cast steel gate valve to API 600 (ISO 10434),
Through-conduit gate valve (flat-plate gate valve) to API 6D;
Stainless steel gate valve to API 603 or API 600;
Inspection and Test: API 598, API 600 or API 6D.
End flange dimension: ASME B 16.5 ( for NPS≤24);
ASME B 16.47 series B, API605 or ASME B 16.47 series A, MSS SP-44(for NPS＞24).
BW end dimension: ASME B 16.25.
Socket-weld dimension: ASME B 16.11.
Face to face and end to end:ASME B 16.10.
Pressure-temperature ratings:ASME B 16.34.
Performance Specification For stainless steel gate valve
|
Technical Specification |
PN(Mpa) |
ANSI Class (Lbs) |
|||||||||||
|
1.6 |
2.5 |
4.0 |
6.4 |
10.0 |
150 |
300 |
400 |
600 |
900 |
1500 |
2500 |
||
|
Test Pressure (MPA) |
Shrength Test |
2.4 |
3.75 |
6.0 |
9.6 |
15.0 |
2.94 |
7.67 |
10.2 |
15.3 |
22.98 |
38.3 |
63.83 |
|
BackSeat Test |
1.76 |
2.75 |
4.4 |
7.04 |
11.0 |
2.16 |
5.62 |
7.48 |
11.23 |
16.85 |
28.08 |
46.81 |
|
|
Seal Test |
1.76 |
2.75 |
4.4 |
7.04 |
11.0 |
2.16 |
5.62 |
7.48 |
11.23 |
16.85 |
28.08 |
46.81 |
|
|
Air Test |
0.55+/-0.07 |
||||||||||||
Applicable temperature: -196 C degree to 600 C degree
Note: please choose different materials for different working conditions.
Application: Common type: water, steam, oil, liquid gas, natural gas etc
Anti-sulphur type: gas oil etc which contains h2s, co composition.
As usual, class 150 to class 900 gate valves are usually used to bolted bonnet, class 1500 to class 2500 gate valves are usually used pressure seal bonnet design.
If being requested by the customer, the spring loaded impacting system can be adopted for enhancing the durability and reliability of the packing seal.
The stem connection to the gate is a T-head design which is integral (without welding) with the stem.
Usually, the stem nut is made of ASTM A439 D2, it is also can be made of Cu alloy or other materials if being requested by customer.
Besides the general gate valves, our company also can make cryogenic gate valve, jacketed gate valve, bellow seal gate valve and extended stem gate valve for underground installation application.
Body: A216 WCB, A352 LCB, A217 WC6, WC9, C5, C12, A351 CF8, CF8M, CF3, CF3M
Bonnet: A216 WCB, A352 LCB, A217 WC6, WC9, C5, C12, A351 CF8, CF8M, CF3, CF3M
Gasket: Spiral wound 304SS+graphite
Disc: A216 WCB+13Cr, A352 LCB+13Cr, A217 WC6+STL, WC9+STL, C5+STL, C12+STL, A351 CF8+STL, CF8M+STL, CF3+STL, CF3M+STL
Disc: A105+13Cr, A105+STL, F11+STL, F22+STL, F5+STL, F9+STL, F304+STL, F316+STL etc
Bolts and nuts: A193 Gr B7/A194 Gr 2H, A193 Gr B16/A194 Gr 4/7, A320 Gr L7/A194 Gr 4, A193 B8/A194 8, A193 B8M/A194 B8
Also we can make the different trim material according to API trim chart, likely monel, hastelloy C, inconel, alloy 20 and so on.