Pilot Operated Solenoid Valve has an electrically operated solenoid and the valve. There is a very weak spring, a rubber diaphragm seal and hole in the seal in the high pressure side of the system. The low pressure side of the system has a solenoid plunger, rubber pilot seal and a pilot hole. The high pressure side of the Air Pilot Operated Solenoid Valve is the inflow and the low pressure side has the outflow. The solenoid operates by electricity and opens or closes the valve as needed. The use of seals may differ as metal or rubber depending on the application type. There are different valve types such as the Solenoid Controlled Pilot Operated Relief Valve which is used for the relief of air from the system.
Stainless Steel Pilot Operated Solenoid Valve
ASTM A351 CF8M 316 burkert valve
ASCO 8551/ 8210 high pressure solenoid valve
The diaphragm of the valve operates with a hole in the center. This allows only a small amount of water flow into the system. The cavity is filled by the inflow of water and the pressure on both sides is balanced to be equal. The Solenoid Controlled Pilot Operated Directional Control Valve controls the direction of flow inside a system. There are different pressure capacities and operational temperatures along with sizes and dimensions depending on the nature of the applications. The Diaphragm Pilot-operated Solenoid Valves might also be automated with electric circuits or be operated manually as needed. The application can be seen in high temperature high pressure applications which are sensitive and of high end.
| Size | 50NB — 600NB |
|---|---|
| Pressure | 150PS1 |
| Temperature | 0 Deg C - 1200 Deg C. |
| Body , Chest | Solid One piece casting of Cast Iron Fg 260, Cast Steel Gr WCB ,CF8,CF8M. |
| Seat | Integral to Body, Soft, Optional. |
| Gate | AISI SS 304,316,316L,317,317L |
| Screw Spindle | AISI SS 410,304,316. |
| Nut | Brass |
| Yoke | Plate type of MS . |
| Gland Follower | Cast Iron , Cast steel , Ductile Iron ,CF8,CF8M. |
| Hand Wheel | Cast Iron , Cast steel , Ductile Iron |
| Gland Packing | PTFE , PTFE Impregnated |
| Ends | Lugged |
| Port | STANDARD [Round], Optional V Port, Diamond Port,. |
| Flow characteristics | 4.2 |
| Nominal voltage | 24 V DC and 12 V DC |
| Pressure range | 2 - 8 bar |
| Media Temperature | -10 to 90°C |
| Max Pressure | 232 psig |
| Kv-value | 3.2 l/min |
| Max. flow | 40 L/min |
ASCO 8210 Pilot Operated Solenoid Valve
ASTM A351 CF8M Pneumatic Solenoid Valve
ASCO 8551 Hydraulic Solenoid Valve
A351 CF8 3 Way Solenoid Valve
CF8 Stainless Steel Gas Solenoid Valve
Stainless Steel 316 Norgren Solenoid Valve
| Operating Air Pressure (Min-Max) | 125 PSI |
| Operating Water Pressure (Min-Max) | 100 PSI |
| Operating Oil Pressure (Min-Max) | 100 PSI |
| Max Fluid Temperature | 160 F |
| Orifice Size | 3/16 in |
| Ambient Temperature | -9 to 50°C (15 to 122°F) |
The pilot-operated solenoid valve has a higher tolerance of liquid pressure than the direct acting solenoid valve.
The flow capacity of the pilot-operated solenoid valve is bigger than that of the directly operated type.