Relay Valve 

Material:316SS

with lock  

Media: Hydraulic

Handle colour: black

the MRR series  relays are multi-pressure control valve for production control and safety system. It functions as a manual reset, pilot operated, normally closed, block and bleed valve. 
the ARR series indicator relay is a multi-pressure control valve for production control and safety system. It functions as a manual reset, pilot operated, normally closed, block and bleed valve. Red indicators that there is no pressure in the pilot chamber. Green indicates that pilot chamber is pressurized.