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We manufacture more than a thousand specifications of over ten series of products, including safety valves, power station valves, steam extraction check valves, gate valves, globe valves, check valves, hard-sealed ball valves, all-welded ball valves, ball valves, butterfly valves, and other models and specifications.
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A46Y-1500LB/2500LB
Forged workpiece pilot safety valve
Pilot-operated safety valves utilize a pilot valve pressure signal to open the main valve. They are characterized by sensitive opening, accurate opening pressure, high reseating pressure, good sealing performance, and easy adjustment. They are widely used in petroleum, natural gas, and other equipment or systems as overpressure protection devices. They effectively contribute to the safe operation of system valves and control energy consumption. Their main features are as follows:
1. A split structure is adopted for the pilot valve lower valve disc, consisting of a lower valve disc shaft and a lower valve disc plate.
2. A stepped pilot valve lower valve disc shaft is designed. The shaft material undergoes heat treatment to increase its hardness and prevent seizing with the connecting body during movement: The difference between the stepped shaft diameter and the blank shaft diameter is between 0~10mm. The blank shaft is circular, and the stepped section is an approximate triangular section cut from a circular section, reducing friction while providing centering guidance and flow.
3. A pilot valve lower valve disc plate is designed. The upper surface is the sealing surface. After separation, the sealing surface can be lapped, improving the accuracy of the sealing surface and its sealing performance, producing a good pulse effect; The outer circle of the lower valve disc plate is also an approximate triangular section cut from a circular section, reducing friction while providing centering guidance and flow.
4. A lower spring is designed. By adjusting the position of the adjusting body, the small spring is compressed or relaxed to adjust the distance between the sealing surface of the lower valve disc plate and the internal sealing surface of the positioning body, achieving the optimal effect of generating pressure pulses. At the same time, the small spring ensures the synchronous movement of the lower valve disc shaft and the lower valve disc plate, improving the pilot valve's performance and thus improving the main valve's performance.
1. A split structure is adopted for the pilot valve lower valve disc, consisting of a lower valve disc shaft and a lower valve disc plate.
2. A stepped pilot valve lower valve disc shaft is designed. The shaft material undergoes heat treatment to increase its hardness and prevent seizing with the connecting body during movement: The difference between the stepped shaft diameter and the blank shaft diameter is between 0~10mm. The blank shaft is circular, and the stepped section is an approximate triangular section cut from a circular section, reducing friction while providing centering guidance and flow.
3. A pilot valve lower valve disc plate is designed. The upper surface is the sealing surface. After separation, the sealing surface can be lapped, improving the accuracy of the sealing surface and its sealing performance, producing a good pulse effect; The outer circle of the lower valve disc plate is also an approximate triangular section cut from a circular section, reducing friction while providing centering guidance and flow.
4. A lower spring is designed. By adjusting the position of the adjusting body, the small spring is compressed or relaxed to adjust the distance between the sealing surface of the lower valve disc plate and the internal sealing surface of the positioning body, achieving the optimal effect of generating pressure pulses. At the same time, the small spring ensures the synchronous movement of the lower valve disc shaft and the lower valve disc plate, improving the pilot valve's performance and thus improving the main valve's performance.
Product Classification:
Key words:
Main Component Materials
| Part Name | Part Material Code | |
| C (Forging) | P (Forging) | |
| Valve Body | Carbon Steel | Stainless Steel |
| Valve Core | Stainless Steel | Stainless Steel |
| Valve Cover | Carbon Steel | Stainless Steel |
| Sealing Surface Material | Iron-based alloy/Cobalt-based alloy | Cobalt-based alloy |
| Spring | Spring Steel | Stainless Steel |
Main External Connection Dimensions
| Specification | Size(mm) | |||
| do | L | L1 | Remarks | |
| 1D/E/F2 | 10 | 121 | 125 | |
| 1½D/E/F2 | 10 | 140 | 149 | |
| 1½G3 | 20 | 171 | 162 | |
| 2G/H3 | 20 | 171 | 178 | |
| 3J/K4 | 33 | 181 | 191 | |
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