Parker 70777 Valve

The Parker 70777 is a high-performance 1 inch GP1057 solenoid valve designed specifically for the rigorous demands of saturated steam and hot water systems. This normally closed solenoid valve features a rugged brass body construction with a stainless steel seat insert, engineered to maintain a high flow capacity of 12.2 Cv. Built for heavy-duty industrial and commercial cycles, it utilizes an ethylene propylene (EPT) diaphragm and seals to ensure a reliable bubble-tight shut-off in high-temperature environments up to 300°F. This 2-way pilot-operated valve is optimized for a steam pressure range of 1 to 50 PSI. Standard technical integration requires FNPT x FNPT connections for a secure fit into existing piping arrays. Please note that this unit is a pressure vessel component and is typically sold without the solenoid coil; ensure you have the compatible G23 or equivalent coil for your specific voltage requirements. Constant monitoring of pressure differentials is recommended for maximum efficiency.

• Specifically engineered for saturated steam service with a maximum rating of 50 PSIG.
• Robust 1 inch NPT pipe size provides a high 12.2 Cv rating for significant flow requirements.
• Features high-grade EPT elastomers and a stainless steel seat for superior thermal resistance up to 300°F.
• Direct replacement for veteran Parker GP1057 configurations in commercial boilers and sterilization equipment.

What happens if the system pressure exceeds 50 PSI?
This valve is strictly rated for a maximum of 50 PSIG saturated steam. Applying this valve to systems where steam is regulated down from pressures above 50 PSIG can cause immediate internal damage and diaphragm failure.

Does this valve include the electrical coil?
No, this is the pressure vessel assembly only. You must match the valve with a compatible Parker solenoid coil that corresponds to your system's voltage and enclosure requirements.

Can this valve be used for cold water applications?
While the brass and EPT materials are compatible with water, this specific model is tuned for the thermal expansion and pressure profiles of steam and hot water. For dedicated cold water service, a standard general-purpose valve may be more cost-effective.

Disclaimer: While we strive for 100% accuracy, product data and specifications are subject to change. Please contact our team to confirm compatibility or technical details before purchasing.