Multiport Relief Valves

Multiport Relief Valves are designed for safety and to dampen the pressure swings within deaerators, steam lines and associated components. The Multiport Relief Valve dash pot vapor action provides smooth relief of excess steam to the atmosphere and maintains limited deaerator operating pressure swings. It eliminates the need to restack trays, and provides protection to the trays, boiler feed pumps and other equipment. Built for long service life, many Newterra valves have been in service for fifty years and some for as long as eighty years.

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Product Overview

Newterra’s Multiport Relief Valves are designed for advanced pressure control and safety in industrial systems, offering a reliable solution for managing overpressure conditions and ensuring operational integrity. These valves feature a multiport design that allows for precise pressure relief, enhancing system safety and performance. Engineered for durability and efficiency, they are suitable for a wide range of applications, including water, steam, and gas systems. The valves’ robust construction ensures long-term reliability and resistance to wear, while their ease of maintenance and adaptability to different system requirements make them a versatile choice for industries seeking to optimize their pressure management and safeguard their infrastructure. Newterra’s Multiport Relief Valves embody the blend of innovation and reliability essential for modern industrial operations.

Features

Multiport Relief Valve Springs cannot be compressed solid nor can the valve be locked closed by external adjustment. When springs are compressed to a maximum point by handwheel adjustment, the valve discs will open upon overpressure. Operating components are internal to the valve, which precludes tampering.

Designed for maximum safety. The valve and springs are designed for the maximum initial relief pressure indicated on the nameplate. This pressure cannot be exceeded by external adjustment even though the valve is fully adjustable to all pressures within the zero to maximum pressure.

Installation should follow every pressure-reducing station on all low-pressure exhaust steam systems using supplementary reduced live steam. This will provide absolute protection should the reducing valve fail in the open position.

Multiport Relief Valves are provided with multiple resilient surfaced vapor cushion discs (on standard brass trim valves) which are non-popping, cushion lift, cushion closed and tight reseating. The seating surface, an extremely resilient high-temperature thermoplastic material, allows movement yet helps provide a reliable “soft seal” that prevents leaking. Since this piston seat and disc assembly seats without leaking and reseats faster than other types of assemblies, useful steam is never wasted. The net result is a reduction of operating costs by saving steam.

Benefits

Controlled steam atmosphere
Easy set pressure adjustment
Alloy Steel springs for high temperatures and Chrome Vanadium Steel springs for medium and low temperatures
The body is cast iron for applications to 500 ºF and cast steel for 600 ºF applications
Discs are vapor cushion gradual lift non-pop type with replaceable resilient seating surfaces

An assembly technician works with power cutting machinery to cut length steel to create components at a Newterra plant in Brockville

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