Designed to be used in conjunction with conventional Sand Probe Element assemblies on process flowlines. These flow control valves will pneumatically iniiate a shutdown or alarm sequence, whenever the Pipe Element is penetrated. Sand Probe Relay assemblies provide an indication that erosion is occurring and corrective action should be taken by the facilities operators.

HLR manufactures several types of Sand Probe Relays. The HLR 7550Aand 7740 are Field Mount models, which are installed directly on flowlines. Our HLR 7930 and 7935 are Panel Mounted models.

Special Feature easy replacement of companion Sand Probe Pipe Elements. Speciality items are manufactured according to your needs.

Reason to Use: HLR's Sand Probe Relays provide the positive control to quickly initiate the closure of the Safety Valve and possibly prevent flowline rupture. This averts pollution and/or injury to personnel. In a situation where Safety Valve closure is not necessary, HLR's relays can be used to sound a pneumatic horn or provide an alarm, to notify personnel of potential problems.