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DELCO Normally Closed Stem Welded Pneumatic Angle Seat Piston Valves
DELCO Pneumatic Welded Angle Seat Piston Valves
A pneumatic angle seat valve offers a high flow rate and can operate at zero pressure difference and high temperatures. It is also suitable for handling high viscosity and dirty media. To operate in an explosive environment (Eex area), simply place the pilot valve outside the area. The valve is controlled by a pneumatic actuator driven by a three-way solenoid valve. The pilot medium pressure enters the actuator cylinder, pushing the piston to open or close the gasket through the stem. The gasket returns to its default position thanks to the return spring in the pneumatic actuator.
There are two types of pneumatic angle seat valves: single-acting and double-acting.
Single-Acting Valve
- Design: Typically has one port on the pneumatic head.
- Operation: Uses a spring to return to its default position. It is further classified into normally open and normally closed types based on the spring function.
Double-Acting Valve
- Design: Typically has two ports on the pneumatic head.
- Operation: The air supply controls the opening and closing. For more precise control, a double-acting valve can be combined with a spring return, as per customer requirements.
Technical Parameters of Valve Body
| Actuator material | Stainless steel or PolyamidePA | Body material | SS304, 316, 316L |
| Seat material | PTFE, F46 | Stem material | SS304, 316, 316L |
| Ambient temp | -30℃~180℃ | Pressure | 0~1.6MPa |
| Connection Type | Welding, flange, thread, clamp | Control type | Single-acting, double-acting |
| Applicable medium | Water, natural gas or liquid alcohol, oil, organic solvent, steam | Optional accessory | Solenoid valve, limit switch box, positioner, etc |
Welded Angle Seat Valve
| Size | Inch | d | D | L | H | A | E | Actuatar |
| DN15 | 1/2″ | 15.5 | 19.5 | 100 | 137 | 175 | 64 | 50 |
| DN20 | 3/4″ | 21.5 | 26.5 | 120 | 145 | 180 | 64 | 50 |
| DN25 | 1″ | 28.5 | 32.5 | 140 | 185 | 215 | 80 | 63 |
| DN32 | 1-1/4″ | 33 | 38.5 | 155 | 210 | 235 | 80 | 63 |
| DN40 | 1-1/2″ | 46 | 52 | 170 | 260 | 245 | 80 | 63 |
| DN50 | 2″ | 57 | 64 | 190 | 300 | 325 | 100 | 80 |
| DN65 | 2-1/2″ | 68 | 77 | 200 | 340 | 355 | 100 | 80 |
| DN80 | 3″ | 82 | 92 | 220 | 385 | 400 | 126 | 100 |
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