Gate Valve Series

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Forged Steel Flange Gate Valve

MFG: Shanghai Fengqi Industry Development Co., Ltd.
Eml: sales@fengqi.sh.cn

Tel: 0086 (021) 3652 8716
Mob: (0086) 138 1635 6498

product drawing

Forged steel flange gate valves
Forged steel flange gate valves

Usage

API forged steel flange gate valve is widely used in the pipeline of oil, chemical, fire station and other working conditions, which ANSI class is 150-2500, and the working temperature less than 600℃. It is used to cut off or connect the medium. Applicable medium: water,oil,steam,etc. Operation mode: manual, gear transmission, electrical, pneumatic and so on.

Structural features

Products designed and manufactured according to API standards, with sealing reliability and excellent performance, it works well with the imported equipment. Above 600Lb disc and the seat sealing using stellite cobalt-based alloy cladding, it is wear-resistant, high temperature resistance, corrosion resistance, and has an excellent anti-abrasion performance and a long service life.
Stem, which has been quenched and tempered and the surface has been treated by nitriding, will have a good anti-corrosion and scratch resistance. The use of wedge flexible disc structure and the large-diameter set rolling, makes the open and close easily.
Full range of body materials, packing and gasket are matched according to the actual working conditions or the user requests, they can be applied to all kinds of pressure, temperature and medium conditions.
1500LB, 2500LB cavity use the pressure of self-tight seal structure. Sealed property is increased by the rising of inner pressure, with high reliability.
Inverted sealing uses stainless steel screw connection seal seat or welding austenitic stainless steel body, it is reliable. And the packing replacement and maintenance can be carried out under non-stop conditions, it is convenient and does not affect system operation.

The materials of main parts

body WCB WC1 WC6 WC9 ZGCr5Mo CF8 CF8M ZGCr18Ni9Ti CF3 CF3M
bonnet WCB 12Cr1MoV WC1 12Cr1MoV WC6 12Cr1MoV WC9 12Cr1MoV ZGCr5Mo 304 CF8 316 CF8M CF3 CF3M
support WCB WCB WCB WCB WCB CF8 CF8M CF3 CF3M
disc WCB WC1 WC6 WC9 ZGCr5Mo CF8 CF8M CF3 CF3M
stem 2Cr13 25Cr2MoV
seat 25 304 304 304 304 304 304 304 304
seal ring pad coated, enhanced flexible graphite
packing enhanced flexible graphite
stem nut ZCuA110Fe3

Body structure

The flange standard is conform to API 602,MSS-SP-118(standard can be adopted)and ANSI B16.34、B35352. the inspection and test are according to API598, marks are according to MSS-Sp-25. using the following structures: full bore or reduced bore.
The face-to-face dimension is according to ANSI B16.10.
The flange dimension is according to ANSI B16.5.
Self-tight pressure bonnet.
Rising stem yoke
Self-centering pressplate and pressure sleeve.
Whole seal seat
Whole flange body
butt welded end is conform to the standard of ASME B16.25
RTJ body and bonnet connection form.
Bolt-connected, spiral wound gasket sealed bonnet; screw-connected,welded sealed bonnet and screw-connected,inner pressure self-tight bonnet.

The reference of the standard material 150Lb-600Lb

No. part name CS to ASTM AS to ASTM SS to ASTM
Type A105N Type F22 Type F304(L) Type F316(L)
1 body A105N A182 F22 A182 F304(L) A182 F316(L)
2 seat A276 420 A276 304 A276 304(L) A276 316(L)
3 disc A182 F430 A182 F304 A182 F304(L) A182 F316(L)
4 stem A182 F6a A182 F304 A182 F304(L) A182 F316(L)
5 gasket 316 packed with flexible graphite 316 packed with PTFE
6 bonnet A105 A182 F22 A182 F304(L) A182 F316(L)
7 boneet bolt A193 B7 A193 B16 A193 B8 A193 B8M
8 cylindrical pin A276 420 A276 304
9 packing sleeve A276 410 A182 F304(L) A182 F316(L)
10 eyelet bolt A193 B7 A193 B16 A193 B8 A193 B8M
11 packing platen A105 A182 F304
12 nut A194 2H A194 4 A194 8 A194 8M
13 stem nut A276 420
14 jam nut A194 2H A194 4 A194 8 A194 8M
15 nameplate SS
16 handwheel A197
17 lubricate gasket A273 431
18 packing flexible graphite PTFE
applicable medium Water,steam,oil,etc Water,steam,oil,etc Nitric acid,acetic acid,etc
suitable temperature -29°C~425°C -29°C~550°C -29°C~200°C
Note: other materials can be used acoording to customers’ requests. The match of sealing material is decided by the specified inner-piece code.
CS=Carbon steel;AS=alloy steel;SS=stainless steel

The main connection dimensions and weight

NPS 1/2 3/4 1 11/4 11/2 2
L(RF) L1(BW) 150Lb 108 117 127 140 165 203
300Lb 145 152 165 178 190 216
600Lb 165 190 216 229 241 292
H(open) 150,300Lb 158 169 197 236 246 283
600Lb 169 197 236 246 283 320
W 100 100 125 160 160 180
weight 150 RTJ 4.5 5.2 8.2 11.5 12.5 20.3
BW 2.8 3.3 5.4 7.1 8.2 12.5
300 RTJ 4.8 6.2 9.3 14 15.5 23.4
BW 3.5 4.4 6.8 8.1 9.2 15.4
600 RTJ 5.9 7.4 10.4 16.2 17.5 18.3
BW 4.5 5.1 8.2 10.5 12.4 20.1

Reference of the standard material of 900Lb-1500Lb

No. Part name CS to ASTM AS to ASTM SS to ASTM
Type A105N Type F22 Type F304(L) Type F316(L)
1 body A105N A182 F22 A182 F304(L) A182 F316(L)
2 seat A276 420 A276 304 A276 304(L) A276 316(L)
3 disc A182 F430 A182 F304 A182 F304(L) A182 F316(L)
4 stem A182 F6a A182 F304 A182 F304(L) A182 F316(L)
5 gasket 316 packed with flexible graphite 316 packed with PTFE
6 bonnet A105 A182 F22 A182 F304(L) A182 F316(L)
7 bonnet bolt A193 B7 A193 B16 A193 B8 A193 B8M
8 cylindrical pin A276 420 A276 304
9 packing sleeve A276 410 A182 F304(L) A182 F316(L)
10 eyelet bolt A193 B7 A193 B16 A193 B8 A193 B8M
11 packing platen A105 A182 F304
12 nut A194 2H A194 4 A194 8 A194 8M
13 stem nut A276 420
14 jam nut A194 2H A194 4 A194 8 A194 8M
15 nameplate SS
16 handwheel A197
17 lubricate gasket A273 431
18 packing flexible graphite PTFE
applicable medium Water,steam,oil,etc Water,steam,oil,etc Nitric acid,acetic acid,etc
suitable temperature -29°C~425°C -29°C~550°C -29°C~200°C
Note: other materials can be used acoording to customers’ requests. The match of sealing material is decided by the specified inner-piece code.
CS=Carbon steel;AS=alloy steel;SS=stainless steel

The main connection dimensions and weight

NPS 1/2 3/4 1 11/4 11/2 2
L(RTJ) 900-1500Lb 216 229 254 279 305 371
L1(BW) 900-1500Lb 216 229 254 279 305 368
H(open) 197 197 236 246 283 330
W 125 125 160 160 180 200
weight RTJ 7.2 11.5 15.6 16.2 22.6 32.8
BW 5.2 9.3 12.4 13.8 18.9 27.5
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