Check valves optimise system integrity – even at extreme temperatures

Check valves optimise system integrity – even at extreme temperatures

Keywords: Instrumentation, Valves, Temperature

Parker Instrumentation has launched a new instrumentation check valve which is optimised for reliable operation at extreme temperatures, and high pressures. High integrity is assured by means of a metal seat, allowing safe operation over an extended temperature range from 2148 to +482°C, and at pressures up to 6,000 psi CWP (2100 to +900°F, up to 413 bar).

Fabricated in 316 stainless steel, Parker's LC Series of lift check valves are available in 1/8, 1/4 and 1/2 in. sizes. Users may also specify the valves for compatibility with existing systems or preferred installation practices by choosing from integrated single (CPI) or twin (A-LOK) ferrule compression tube fittings, or female NPT pipe thread connections. The forged body is very compact, and spans only 5.1 cm/2 in. in its smallest 1/8 in. implementation.

The new metal-seated check valve is ideal for liquid service applications,and provides a simple means of adding protection in any system where back flow or pressure might cause a problem or damage. The LC Series employs back pressure and a gravity-assisted poppet to achieve a seal, and prevent flow in the reverse direction to within 99.9 per cent of forward flow.

The high environmental specification of the LC Series makes the valve a safe option for handling the temperature extremes found inside power generation,petrochemical, and chemical processing plants, within oil and gas transmission facilities, and on laboratory test and evaluation equipment. Typical applications include equipment where back flow can cause contamination, such as analytical instrumentation, and on equipment which can be damaged by back flow,such as pumping systems.