Internal thread globe valve S type
Features
-1/Z~2, (DN15-DN50)
- W.P,: 200WOG (PN16)
- W.T.:425*C
一 Investment casting
- Rising stem
- Thread end: ASME B 1.20.1 (NPT),
DIN 259/DIN 2999, BS 21,
ISO 288-1, ISO 7-1
- Socket weld end: ASME B16.11
Internal thread globe valve operating principle
1. When the handwheel is turned clockwise, the valve stem moves downward, and the valve disc descends to make the sealing surface close and cut off the passage. When it is reversed, it opens, and the valve stem lifts to the point where the seal works.
2. An upper seal is added to the valve. When the valve is open, it has a two-layer sealing effect together with the packing, and has a certain protective effect on the packing.
3. The valve adopts nylon product as the sealing surface, the packing is soft formed packing, the upper seal is also made of soft material, and the sealing performance is good.
The structural forms of the internal thread globe valve body are straight-through type, direct-current type and right-angle type. Straight-through is a common structure, but its fluid resistance. The direct-flow fluid resistance is small, and it is mostly used for fluids containing solid particles or high viscosity. The right-angle valve body is mostly forged, which is suitable for the globe valve with smaller passage and higher pressure.
Material List
No. | PARTS | MATERIAL | |||
1 | BODY | WCB | CF8 | CF8M | |
2 | DISC | CF8 | CF8 | CF8M | |
3 | STEM | 304 | 304 | 316 | |
4 | GASKET | PTFE | |||
5 | BONNET | WCB | CF8 | CF8M | |
6 | WASHER | 304 | 304 | 316 | |
7 | PACKING | PTFE | |||
8 | GLAND | 304 | |||
9 | BONNET NUT | WCB | CF8 | CF8M | |
10 | HANDWHEEL | ZL101 | |||
11 | TO FLAT PAD | 304 | |||
12 | NUT | 304 |
Dimensions
SIZE | d | L | H | W | D | J | |
1/2' | DN15 | 15 | 60 | 88 | 70 | 21.8 | 9.5 |
Mar-41 | DN20 | 20 | 70 | 93 | 70 | 27.2 | 12.5 |
1' | DN25 | 25 | 80 | 110 | 70 | 33.9 | 12.5 |
1-1/4' | DN32 | 32 | 89 | 116 | 80 | 42.7 | 12.5 |
1/1/2021 | DN40 | 40 | 104 | 132 | 100 | 48.8 | 12.5 |
2' | DN50 | 50 | 118 | 145 | 100 | 61.2 | 16 |
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