m series is a high-efficiency pilot-operated safety valve with a unique full and semi-nozzle design, meeting dimensions according to API 526. Both pop action and modulating pilots are available for liquid and gas applications.
RADMAN Pilot Operated Valves Types:
■ Pop Action: This type controls the main valve rapidly, being either fully open or fully closed, and is specifically designed for gas applications.
■ Modulating: In this type, the main valve opens in a controlled manner. The overpressure is continuously monitored, and the opening of the main valve is proportional to the overpressure.
Features and Benefits
. Close system operating pressure:
Pilot-operated valves can accommodate system operating pressures much closer to the set pressure than standard spring-loaded safety relief valves. System pressures in the range of 95 to 98% of the set pressure are often manageable.
. Tolerates high inlet pressure loss:
High inlet pressure losses caused by challenging inlet piping systems can be mitigated by remote sensing pilots, ensuring trouble-free operation.
. Close differential pressure setting:
Pop-action pilot-operated valves act quickly, with minimal delay between the pilot and the main valve opening pressures. Modulating valves inherently have a slight delay, typically around 2%, ensuring the pilot does not leak when the system pressure is close to the set pressure.
. Close blowdown and overpressure tolerance:
Pop-action safety valve pilots can be adjusted to achieve zero overpressure and blowdown, typically equal to 3% of the set pressure.
. Non flowing pilot:
Safeset Pilots are designed with a non-flowing configuration, eliminating the risk of freezing caused by pressure drops in the flowing medium. Additionally, since the medium remains static, dirt particles are not carried into the pilot, which helps extend its service life and ensures reliable, trouble-free operation.
. Integral pilot filter:
m series pilot-operated safety valves are equipped with integral filters for added reliability and efficiency.
. Full lift capability:
Pilot-operated safety valves maintain full lift against high levels of back pressure. Unlike spring-loaded safety valves, which require either differential settings or balanced bellows, the M Series handles high back pressure efficiently.
. Soft seat:
Both the m Series pilot and main valves feature soft seating to ensure optimal leak-tightness. Various materials are available for a broad range of applications. Maintenance is simplified due to reduced seat lapping requirements.
. Integral sensing:
m series pilots are equipped with integral sensing directly from the nozzle, providing a compact design and accurate pressure sensing from within the flow stream. For challenging inlet piping systems, remote sensing is recommended.
. Two part piston-disc assembly:
This assembly reduces the guiding geometry, minimizing the size of components within the body bowl, which increases the effective discharge area through the valve outlet.
. Wide range of accessories:
The m Series is available with a variety of accessories, including:
▶ Backflow preventer
▶ External supply filter
▶ Remote pressure sensing
▶ Heating or cooling coils
▶ Field test connector
▶ Packed lift levers
▶ Ferrules (governor rings)
▶ Test gag