Reliable, Repeatable Control
Relief valves provide crucial control in many systems, relieving pressure of liquid, gas or steam as it rises beyond the allowable level. Aerospace and marine pressure relief valves are critical for preventing excessive pressures from damaging critical components. Marotta Controls provides our customers with a wide range of pressure relief valves for aircraft, naval vessels, space vehicles and more.
We offer a complete line of soft opening and closing relief valves for high-pressure applications with excellent, repeatable control and a tight cracking/reseat pressure band due to upstream pressure control.
Marotta has developed pressure relief valves for systems that contain gases and liquids in a variety of pneumatic, hydraulic and cryogenic applications. These improved hydraulic relief valves and pneumatic pressure relief valves are designed to suppress instabilities that shorten operational lifetimes and create hazards in the operation of older relief valves. Marotta has a wide selection of low- and high-water-pressure relief valves with excellent control characteristics.
- High-pressure applications
- Hydraulic systems
- Pneumatic systems
- Cryogenic systems
- Aircraft controls
- Missile controls
- Shipboard controls
PRV95-FA
Unlike other direct-acting relief valves, the PRV95 has a pressure-sensing disc on the poppet upstream of the seat that controls the valve position. By placing this control surface in the area of relatively constant fluid density, the PRV95 provides highly stable control throughout its operating range. Marotta provides these valves in standard stainless steel construction as well as other materials upon request.
- Smooth, chatter-free operation
- Contamination tolerant
- Cartridge designs for ease of maintenance
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PRV95
Patented design for chatter-free operation, this marine pressure relief valve was developed for critical applications on advanced nuclear submarines. The valve seat seals against the outer radius of the poppet, creating a larger sealing surface that delivers better protection against contamination. The PRV95 provides repeatable operation with minimal hysteresis and eliminates the effects of turbulence on valve operation. Capable of tolerating pressures of up to 10,000 psg, these stainless steel valves offer exceptional durability and dependability while also being relatively easy to maintain.
- Patented design
- Manual override and gagging options
- Maximized repeatability
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Positive Pressure Relief Valves
PPRV inverted positive pressure valves are specifically designed to safely relieve space capsule over-pressurization. These proven, flight-qualified PPRV valves’ Vespel® seats, pistons and o-ring seals prevent leakage paths from depressurizing the capsule. The valve, poppet and seat join together under safe operating pressure and can separate quickly at an adjustable setpoint to reach maximum flow position with minimal pressure drop. Its floating piston design allows the valve to crack and reseat within a narrow pressure band of 0.75 psi.
- Adjustable cracking pressure
- Floating piston design
- Compact design, low maintenance
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To learn more about everything we have to offer, get in touch with us today to discuss your needs.