Forged Steel Gate valves are available in three bonnet designs. The first design is the Bolted Bonnet, with male-female joint, spiral wound gasket, made in F304+flexible graphite. Ring joint gasket are also available on request. The second design is the welded bonnet, with a threaded and seal welded joint. On request a full penetration strength welded joint is available. The third design is the pressure seal bonnet, with a threaded and pressure seal bonnet joint.
• Full port or reduced port;
• Outside screw and yoke (OS & Y);
• Two piece self-aligning packing gland;
• Bolted bonnet & spiral wound gasket seal bonnet;
• Threaded and sealwelded bonnet or threaded and pressure seal bonnet;
• Integral backseat;
• Socket weld ends to ASME B16.11;
• Screwed ends (NPT) to ANSI/ASME B1.20.1.
Structural formation: Bolt (Weld)-jointed bonnet outside stem yoke structure
Driving manner: Hand-operated
Design standard: API602, BS5352
Thread ends: ASME B1.20.1
Socket welded ends: ASME B16.11
Test & inspection: API 598
| No. | Part name | Material |
|---|---|---|
| 1 | Flange | ASTM A105; ASTM A182-F11, F22, F5, F9; ASTM A182-F304, F316, F321, F304L, F316L |
| 2 | Body | ASTM A105; ASTM A182-F11, F22, F5, F9; ASTM A182-F304, F316, F321, F304L, F316L |
| 3 | Seat | ASTM A105; ASTM A182-F11, F22, F5, F9; ASTM A182-F304, F316, F321, F304L, F316L |
| 4 | Gate disc | ASTM A105; ASTM A182-F11, F22, F5, F9; ASTM A182-F304, F316, F321, F304L, F316L |
| 5 | Stem | ASTM A182Gr.F6a, ASTM A182F22; ASTM A182-F304, F316, F321, F304L, F316L |
| 6 | Gasket | Graphite & stainless steel |
| 7 | Bonnet | ASTM A105; ASTM A182-F11, F22, F5, F9; ASTM A182-F304, F316, F321, F304L, F316L |
| 8 | Bolt | ASTM A193-B7, A320-B8, F321, F304L, F316L |
| 9 | Packing | Graphite |
| 10 | Packing press-sleeve | ASTM A182Gr.F6a, ASTM A182F22; ASTM A182-F304, F316, F321, F304L, F316L |
| 11 | Packing gland | ASTM A216-WCB; ASTM A351-CF8, CF8M, CF8C, CF3, CF3M |
| 12 | Valve stem nut | Copper alloy |
| 13 | Handwheel | ASTM A47-32510 |
Class 150 / 300 / 600
| DN (mm) | DN (in) | Class | L (RF) | L (RTJ) | H | W | Weight (kg) |
|---|---|---|---|---|---|---|---|
| 15 | 1/2 | 150 | 108 | 119 | 160 | 100 | 4.5 |
| 15 | 1/2 | 300 | 140 | 151 | 160 | 100 | 4.8 |
| 15 | 1/2 | 600 | 165 | 163.5 | 160 | 100 | 5.8 |
| 20 | 3/4 | 150 | 117.5 | 130 | 165 | 100 | 5.1 |
| 20 | 3/4 | 300 | 152.5 | 165 | 165 | 100 | 6.2 |
| 20 | 3/4 | 600 | 190.5 | 190.5 | 165 | 100 | 7.5 |
| 25 | 1 | 150 | 127 | 140 | 192 | 125 | 8.5 |
| 25 | 1 | 300 | 165 | 178 | 192 | 125 | 9.4 |
| 25 | 1 | 600 | 216 | 216 | 192 | 125 | 10.3 |
| 32 | 1-1/4 | 150 | 140 | 153 | 220 | 160 | 11.5 |
| 32 | 1-1/4 | 300 | 178 | 191 | 220 | 160 | 14.2 |
| 32 | 1-1/4 | 600 | 229 | 229 | 220 | 160 | 16.3 |
| 40 | 1-1/2 | 150 | 165 | 178 | 245 | 160 | 11.2 |
| 40 | 1-1/2 | 300 | 190.5 | 203 | 245 | 160 | 15.5 |
| 40 | 1-1/2 | 600 | 241 | 241 | 245 | 160 | 17.5 |
| 50 | 2 | 150 | 178 | 216 | 285 | 180 | 20 |
| 50 | 2 | 300 | 216 | 232 | 285 | 180 | 23.5 |
| 50 | 2 | 600 | 292 | 295 | 285 | 180 | 28.4 |
Class 800 / 1500
| DN (mm) | DN (in) | Full bore (mm/in) | Class | L | H | W | Weight (kg) |
|---|---|---|---|---|---|---|---|
| 15 | 1/2 | 10 / 3/8 | 800 | 80 | 160 | 100 | 1.9 |
| 15 | 1/2 | 10 / 3/8 | 1500 | 111 | 203 | 125 | 4.2 |
| 20 | 3/4 | 15 / 1/2 | 800 | 92 | 165 | 100 | 2.1 |
| 20 | 3/4 | 15 / 1/2 | 1500 | 111 | 203 | 125 | 4.6 |
| 25 | 1 | 20 / 3/4 | 800 | 111 | 192 | 125 | 3.2 |
| 25 | 1 | 20 / 3/4 | 1500 | 115 | 216 | 160 | 6.2 |
| 32 | 1-1/4 | 25 / 1 | 800 | 120 | 220 | 160 | 6.9 |
| 32 | 1-1/4 | 25 / 1 | 1500 | 120 | 235 | 160 | 8.2 |
| 40 | 1-1/2 | 32 / 1-1/4 | 800 | 120 | 245 | 160 | 6.9 |
| 40 | 1-1/2 | 32 / 1-1/4 | 1500 | 140 | 275 | 180 | 11.0 |
| 50 | 2 | 40 / 1-1/2 | 800 | 140 | 285 | 180 | 10.4 |
| 50 | 2 | 40 / 1-1/2 | 1500 | 162 | 320 | 200 | 15.8 |
| 50 | 2 | 50 / 2 | 800 | 172 | 392 | 200 | 15.8 |
| 50 | 2 | 50 / 2 | 1500 | 180 | 368 | 250 | 24.5 |
Step 1: Order and Design
Confirm the customer's requirements, including size, pressure class, material, connection type, and applicable standards. Based on these specifications, the design drawing and production plan for the forged steel gate valve are prepared.
Step 2: Forging & Casting
The main body, bonnet, and other pressure-retaining parts are produced by closed-die forging to ensure high strength and dense grain structure. For a forged steel gate valve, forging quality is very important for pressure resistance and service life.
Step 3: Machining
After forging and heat treatment, all components are machined, including body cavity, flange ends, threaded parts, stem, seat area, and gate sealing surfaces. Precision machining ensures the forged steel gate valve meets dimensional accuracy and sealing requirements.
Step 4: Assembly
All finished parts are cleaned and assembled in sequence, including the body, bonnet, stem, gate, seat, gasket, and handwheel. Proper assembly is essential to guarantee smooth opening and closing performance of the forged steel gate valve.
Step 5: Testing & Quality Assurance
Each valve undergoes pressure testing, shell testing, sealing testing, and dimensional inspection according to relevant standards such as API and ISO. Strict quality control ensures every forged steel gate valve is safe, reliable, and ready for service.
Step 6: Painting and Finishing
After final inspection, the valve surface is cleaned, painted, marked, and packed. The finished product is then labeled and prepared for shipment according to customer and export requirements.
Primarily used in piping systems in sectors such as thermal power plants, petroleum, chemical, and electric power, these valves are designed to control the flow of fluids such as water, steam, oil, and corrosive media.
These valves are widely used in:
Oil and Gas
Chemical Processing
Power Plants
Water Treatment
Metallurgy and Mining
Agriculture and Irrigation
Superior Quality
Our valves are manufactured using premium materials and undergo rigorous quality testing to ensure reliable performance in demanding industrial applications.
Advanced Technology
Equipped with state-of-the-art CNC machining centers and precision manufacturing equipment, we deliver valves with exceptional accuracy and consistency.
Competitive Pricing
Through optimized manufacturing processes and bulk material procurement, we offer high-quality valves at competitive prices without compromising on quality.
Expert Support
Our experienced technical team provides comprehensive support from product selection to after-sales service, ensuring optimal valve performance for your specific application.
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