The durable GB standard stainless steel gate valve manufactured by JQF Valve is made of stainless steel. The valve seat sealing surface is made of polytetrafluoroethylene (PTFE), stainless steel + hard alloy, or surface-treated hard alloy. The packing is made of hard alloy, polytetrafluoroethylene (PTFE), asbestos, or flexible graphite. The nominal size is DN15～DN800, the working pressure is 1.6MPa～20.0MPa, and the applicable temperature is ≤200℃. It is suitable for pipelines carrying nitric acid and weakly corrosive media.
1. Pre-installation Inspection: Confirm the compatibility of valve material with fluid medium, temperature, and pressure. Inspect the durable GB Standard Stainless Steel Gate Valve end face for scratches. Ensure the gasket material meets the usage requirements and confirm that the bolts/nuts meet strength requirements.
2. Installation Alignment: Do not force alignment. Misalignment can lead to valve seat deformation, leakage, or structural stress. Support the piping independently near the valve. Tighten the bolts gradually in a star-shaped sequence until a uniform torque is achieved. After the system has run for 24-48 hours, retighten the bolts.
3. Operating Procedures: The high quality GB Standard Stainless Steel Gate Valve should be fully open or fully closed—partial opening will accelerate the erosion of the valve seat/plate by high-speed fluid. Operate only using the handwheel; never use a wrench/lever. The valve stem must be lubricated quarterly.
4. Testing and Maintenance: After installation, before system commissioning, a static pressure test should be performed on the GB Standard Stainless Steel Gate Valve at 1.5 times the PN rated pressure. During testing, the valve should be isolated from downstream equipment.
5.Storage and Handling: Valves should be stored indoors and protected from moisture. Before installation, the end caps should remain in the installed position.
1. The GB Standard Stainless Steel Gate Valve is made of austenitic stainless steel, which has excellent resistance to corrosion from oxidizing acidic media.
2. When the medium flows through the GB Standard Stainless Steel Gate Valve, the flow direction remains unchanged, resulting in low fluid resistance.
3. The gate's movement direction is perpendicular to the medium's flow direction, resulting in low opening and closing torque and effortless operation.
4. The medium's flow direction is unrestricted, without disturbing fluid flow or reducing pressure. The medium can flow from either side of the gate valve, achieving its intended purpose. It is particularly suitable for pipelines where the medium's flow direction may change.
5. The GB Standard Stainless Steel Gate Valve is vertically installed within the valve body, resulting in a short structural length.
6.The GB Standard Stainless Steel Gate Valve has good sealing performance. Wear on the sealing surface is minimal when fully open.
Design specifications: GB / T 12234
Structure length: GB / T 12221
Connecting flange: JB / T 79.1
Test and inspection: JB / T 9092
Pressure - Temperature: GB / T 9131
Product Identification: GB / T 12220
| Nominal pressurePN（MPa) | case | test pressure（MPa) | Sealed | |
| Sealed (liquid) | Seal (gas) | |||
| 1.6 | 2.4 | 1.8 | 0.6 | 1.8 |
| 2.5 | 3.8 | 2.8 | 0.6 | 2.8 |
| 4.0 | 6.0 | 4.4 | 0.6 | 4.4 |
| 6.4 | 9.6 | 7.0 | 0.6 | 7.0 |
| 10.0 | 15.0 | 11.0 | 0.6 | 11.0 |
| 16.0 | 24.0 | 18.0 | 0.6 | 18.0 |
| Shell material | Suitable media | Applicable temperature (℃) |
| Chromium nickel titanium steel (P type) | Nitric acids | ≤200 |
| Chrome nickel molybdenum titanium steel (R type) | Acetic acid | ≤200 |
| Body, bonnet | Valve plate, seat | Valve stem | Stem nut | filler | Handwheel |
| Chromium nickel titanium steel | Stainless steel, stainless steel + cemented carbide | Chrome nickel-titanium stainless steel | Aluminum bronze | Teflon | Malleable iron |
| Chromium nickel molybdenum titanium steel | Stainless steel, stainless steel + cemented carbide | Chrome nickel-titanium stainless steel | Aluminum bronze | Teflon | Malleable iron |
| Nominal diameter | The main dimensions and connection dimensions | |||||||
| L | D | D1 | D2 | b | Z-d | H | D0 | |
| Z41W-16P | ||||||||
| 15 | 130 | 95 | 65 | 45 | 14-2 | 4-Φ14 | 170 | 120 |
| 20 | 150 | 105 | 75 | 55 | 14-2 | 4-Φ14 | 190 | 140 |
| 25 | 160 | 115 | 85 | 65 | 14-2 | 4-Φ14 | 205 | 160 |
| 32 | 180 | 135 | 100 | 78 | 16-2 | 4-Φ18 | 270 | 180 |
| 40 | 200 | 145 | 110 | 85 | 16-3 | 4-Φ18 | 310 | 200 |
| 50 | 250 | 160 | 125 | 100 | 16-3 | 4-Φ18 | 358 | 240 |
| 65 | 265 | 180 | 145 | 120 | 18-3 | 4-Φ18 | 373 | 240 |
| 80 | 280 | 195 | 160 | 135 | 20-3 | 8-Φ18 | 435 | 280 |
| 100 | 300 | 215 | 180 | 155 | 20-3 | 8-Φ18 | 500 | 300 |
| 125 | 325 | 245 | 210 | 185 | 22-3 | 8-Φ18 | 614 | 320 |
| 150 | 350 | 280 | 240 | 210 | 24-3 | 8-Φ23 | 674 | 360 |
| 200 | 400 | 335 | 295 | 265 | 26-3 | 12-Φ23 | 811 | 400 |
| 250 | 450 | 405 | 355 | 320 | 30-3 | 12-Φ25 | 969 | 450 |
| 300 | 500 | 460 | 410 | 375 | 30-3 | 12-Φ25 | 1145 | 580 |
| 350 | 550 | 520 | 470 | 435 | 34-4 | 16-Φ25 | 1280 | 640 |
| 400 | 600 | 580 | 525 | 485 | 36-4 | 16-Φ30 | 1452 | 640 |
| Z41W-25P | ||||||||
| 15 | 130 | 95 | 65 | 45 | 16-2 | 4-Φ14 | 170 | 120 |
| 20 | 150 | 105 | 75 | 55 | 16-2 | 4-Φ14 | 190 | 140 |
| 25 | 160 | 115 | 85 | 65 | 16-2 | 4-Φ14 | 205 | 160 |
| 32 | 180 | 135 | 100 | 78 | 18-2 | 4-Φ18 | 270 | 180 |
| 40 | 200 | 145 | 110 | 85 | 18-3 | 4-Φ18 | 310 | 200 |
| 50 | 250 | 160 | 125 | 100 | 20-3 | 4-Φ18 | 358 | 240 |
| 65 | 265 | 180 | 145 | 120 | 22-3 | 8-Φ18 | 373 | 240 |
| 80 | 280 | 195 | 160 | 135 | 22-3 | 8-Φ18 | 435 | 280 |
| 100 | 300 | 230 | 190 | 160 | 24-3 | 8-Φ23 | 500 | 300 |
| 125 | 325 | 270 | 220 | 188 | 28-3 | 8-Φ25 | 614 | 320 |
| 150 | 350 | 300 | 250 | 218 | 30-3 | 8-Φ25 | 674 | 360 |
| 200 | 400 | 360 | 310 | 278 | 34-3 | 12-Φ25 | 811 | 400 |
| 250 | 450 | 425 | 370 | 332 | 36-3 | 12-Φ30 | 969 | 450 |
| 300 | 500 | 485 | 430 | 390 | 40-4 | 16-Φ30 | 1145 | 580 |
| 350 | 550 | 550 | 490 | 448 | 44-4 | 16-Φ34 | 1280 | 640 |
| 400 | 600 | 610 | 550 | 505 | 48-4 | 16-Φ34 | 1452 | 640 |
Address
No.1, North 1st Road, Stainless Steel New Town, Lecong Steel World West Road, Shunde District, Foshan City, Guangdong Province, China
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