Stainless steel gate valve

Column:Technical article Time:2023-10-13
Product model: Z41W
Nominal diameter: NPS 2"~48", DN50~1200mm
Pressure range: CL150 ~ 2500Lb, PN10~420MPa


[Valve structure drawing]


Screw gate valve main material in American Standard:

NO. Name Material
1 BODY CF8M CF8 WCB
2 DISC CF8M CF8 WCB
3 STEM SUS304
4 GASKET Graphite
5 NUT A194-8
6 BOLT  A193-B8
7 CAP CF8M CF8 WCB
8 SEAT SUS304
9 STEM PACKING Graphite
10 HINGE PIN SUS304
11  EYE BOLT8 A193-B
12 NUT A194-8
13 NUT A194-8
14 BOLT A193-B8
15 STAND CF8M CF8 WCB
16 STEM NUT   SUS304
17 NIPPLE         SUS304
18 BEARING  CAP PLASTIC
19 HANDLE WHEEL    QT400-18
20 NUT         A194-8


[Standard parameter]

Design standard API 600、API6D、ASME B16.34、GB/T 12234
Structural length ASME B16.10、API6D、GB/T 12221
Connection standard ASME B16.5、ASME B16.47、GB/T 9113、JB/T 79、HG/T 20592
Pressure test API 598、GB/T 13927、JB/T 9092
Pressure temperature rating ASME B16.34 、GB/T 12224


[Valve features]

1, the gate has two sealing surfaces, the sealing surface to form a wedge, wedge angle varies with valve parameters, usually 5 degrees.
2, wedge gate valve sealing principle is combined by two on the two upper wedge sealing surface and sealing surface of the valve body wedging, thereby sealing performance.
3, wedge gate valve according to the stem drive gate opening and closing different ways, can be divided into bright rod gate valve (lift rod gate valve) and dark rod gate valve (rotary rod gate valve).
4, wedge gate valve in accordance with the different forms of the gate structure, can be divided into elastic gate valve and rigid gate valve.
5, the valve body for casting molding, valve body and valve cover with bolt connection, the middle flange using spiral gasket seal, the customer has special requirements can also be used metal ring connection.
6, the channel is smooth, the flow coefficient is small. The sealing surface is eroded and eroded by medium.
7, The sealing surface is made of alloy steel or hard alloy. It has good abrasion resistance and scratch resistance.
8, flexible graphite packing, reliable sealing, easy and flexible operation.
9, medium flow unrestricted, no disturb, do not reduce pressure.


[Adaptive condition]
Stainless steel valve for the nominal pressure of PN1.6 ~ 16.0MPa, -29 pipeline working temperature less than 550 DEG C, hydraulic oil and chemical industry, thermal power plants of various systems, cut off or connected piping media.