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All Categories > Drilling Rig Air Valves for MMO (Marine, Mobile & Oil Field) > Emerson Aventics (WABCO) Drilling Rig Air Valves > Aventics Relay Valves > Rexroth Type 'S' Relay Valves > Rexroth Type 'S' Relay Valves > Item # R431000775  
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Item # R431000775, Rexroth Type 'S' Relay Valves


Features
Reliability - Automatically sustains pressure directed by the pilot line on a 1 to 1 ratio (optional ratios shown below). The balanced internal valve functions to relieve excess pressure, or to maintain pressure against demand. Rubber seated valves provide zero leakage.

Installation Versatility - Operates in any position. May be supported by piping alone or by a mounting bracket. The IN and OUT ports are plainly marked on the body.

Ease of Maintenance - The valve may be serviced without disturbing line connections. All parts are accessible by removing top cover. No special tools are required.

Large Capacity - Designed with minimum valving to provide maximum flow (see graph).

Modern Construction - All materials are corrosion resistant. The sturdy die cast body contains wrench flats for ease of installation. Ports have dry seal pipe threads (suitable with standard pipe thread).

Positive Seals - Packing rings are located at all critical points in the assembly to eliminate internal and external leakage.

Application
The "S" Relay Valve is a pilot-operated, 3-way, pneumatic pressure control valve with open exhaust. The large capacity of this valve makes it an ideal volume booster. It receives pressure signals from a remote control valve and repeats this pressure with a greater rate of flow to the component being controlled. The valve serves to speed response time between sending and receiving stations in a pneumatic circuit which involves long piping runs or branch circuits. Where the controlled component is not in a readily accessible location, remote piloting provides a solution.




Specifications  · Materials

Specifications

Old Part #
P -027257-00000
P027257
P-027257
P27257
P-27257

Pipe Size
1/2"-18 Adjustable

Model Designation
2-S

Type
3 way pilot operated pressure control

Maximum Supply Pressure
250 psi

Maximum Pilot Pressure
250 psi

Ratio-Pilot To Delivery
1:1 standard; others noted below.

Temperature Range
-20 to 160 ºF

Media
Air or inert gas

Pilot Port Size
1/4" NPT

Body Port Size
1/4" and 1" as noted below

Hysteresis
Less than 5 psi.


Materials

Body Material
3/4" and 1" die cast aluminum
3/8" & 1/2" die cast zinc

Diaphragm Material
Nylon reinforced HYCAR

Other Material
Anodized aluminum or plated


 MORE IMAGES 

·  Rexroth Type S Valve Flow Capacities

·  Rexroth Type S Valve Operating Characteristics

·  Type S Relay Valves Details



 P -027257-00000 Rexroth Type 'S' Relay Valve Repair Kits 


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item-11911
Rexroth Type 'S' Relay Valve Repair Kits

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