Gauge Protectors, Shuttle Valves and
Miscellaneous Valves from Circle Seal Controls
| For Aerospace/Military Applications | Gauge Protectors = 1100 Series Gauge Protectors Shuttle Valves = 400 Series Automatic Drain Valves = P-526, P-392 Bleed Valves, Manual, Low Pressure = P-228 Sampling & Bleed Valves = P-500, HV22 Drain Valves, Manual = P-394 Check-Relief Valves = P-389 Filler Valves, Fill & Bleed Valves = P-228, P-308, P-427, P-691 Pressure Blanking Valves = 1200 Series Selector Valves, Manual = P-395, P-418 Vacuum Breaker Valves = P-534, P-664, P-635 Vacuum Breaker, Vent or Breather Valves = P-249, P-262 Relief Valves, Low Pressure, High Flow = P-533 Vent Valves, Float Actuated = P-401 Integrated Fluid Circuit Manifolds Motor Operated Valves = EM91, EM95, EM57, EM56 & EM74 Fuse Valves = V-4360, Flow Limiters = P-595 Hydraulic Restrictor Valves = CV99-39/-105, CV99-41/-104, CV99-39/-40 |
| For more miscellaneous valves, please visit our non-aerospace site. | |
P-500 Sample & Bleed Valves
 P-500 Series (L) and HV22 Series (R) |
Sample & Bleed Valves for High PressureThe P-500 Series High Pressure Sample and Bleed Valves provide minimum weight with compace configuration designs. Both the P14-500 and P15-500 have been qualified to the requirements of MIL-V-81940. Other valves in the P-500 Series have been qualified to this specification by similarity. In addition, the P31-500 meets the Hi-Shock requirements called for in MIL-S-901C.
Sample & Bleed Valves for Low PressureOur Low Pressure Sample and Bleed valves also provide compact configuration designs and minimum weight for low pressure service where less severe conditions are anticipated. The HV22-24 Series meets the requirements of MIL-V-81940/2(ME) and HV22-23 meets the requirements of MIL-V-81940/3(ME) for ground support equipment with operating pressure to 300 PSI. Hydraulic Sampling and Bleed ValvesAmong the many variations available, the HV99-46 Hydraulic Sampling and Bleed Valve is used on the hydraulic system of the solid rocket booster (SRB). This stainless steel valve operates in a Type II, Class 3000 PSI hydraulic system meeting the general requirements of MIL-H-5440, with hydraulic fluid compatibility per MIL-H-83282B and a temperature range of −65° F to +275° F.
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P-389 Check-Relief Valves
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A combination check and thermal relief valve to provide free flow in one direction, zero leakage in the reverse direction, with an internal thermal relief unit.
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Motor-operated Valves
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By utilizing proven state-of-the-art designs, Circle Seal Controls' Motor-operated Valves meet or exceed the demanding requirements of today's high-performance turbine powered aircraft. The product line includes a full size range of gate valves and a full size range of ball valves, plug, spool, and butterfly valves. The electric motor actuator is designed and manufacturered using well-established methodology to provide a reliable, long cycle life, no maintenance acutator for electrical operation of valve mechanisms. These valves are qualified in accordance with the requirements of MIL-STD-810C and have been test proven to handle 10,000 cycles minimum at a torque of 45 lb/inch (capabilities to 50,000 cycles and greater). Units have been designed and tested in accordance with MIL-V-8608 and MIL-M-8609. Emission of radio frequency interference has also been controlled. The units have been qualified and can be manufactured to meet the requirements of RTCA Document DO-160A, Category A (equivalent to Boeing Document D6-16050-2, Category 3A).
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V-4360 Fuse Valves & P-595 Flow Limiters
 Flow Limiter (L) and Fuse Valve (R) |
Fuse ValvesThe fuse valves provide automatic shutoff after passing a prescribed volume reacting under certain conditions to close a hydraulic line when those conditions are indicative of an actual or potential downstream amlfunction. All of the fuse valve assemblies are self-resetting and contain a manual bypass valve mechanism. Circle Seal Controls fuse design has been test-proven to over 20,000 cycles. Flow LimitersThe flow limiting valve assemblies are pressure compensated flow control devices preset to control the flow regulation in one direction to within ±3%. Units can be provides which will regulate flow in both directions. Circle Seal Controls flow limiting design has been test-proven for a fatigue life of over 4,400,000 impulse cycles and endurance of over 1,100,000 cycles.
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1100 Series Gauge Protector
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Features • Instant Automatic Cut-out • Automatic Gauge Cut-in • Protection Against Surge or Shock Waves • Snubbing Action to Reduce Shock to Gauge • Contact Seals to Insure Precise, Unfailing Operation  View the Catalog (PDF: 478 KB) |
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400 Series Shuttle Valve
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| Features • Quick, Positive Shuttling • Double Poppet • Positive Sealing - Dead Tight • Zero Leakage View the Catalog (PDF: 179 KB / 3 pages) |
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Teflon® is a registered trademark of DuPont and Viton® is registered trademark of DuPont Dow Elastomers.
See Circle Seal Controls' Product Catalog for our full line of miscellaneous valves for aerospace/military applications.