True Blue® Relief Valves provide smooth, sensitive operation to help you manage pressure "upstream" of the valve.

One valve design serves many functions...
• Preventing overpressure conditions in vessels and piping systems (relief valve).
• Providing by-pass flow relief to avoid pumping problems such as deadheading (pump bypass valve).
• Maintain backpressure in a piping system (backpressure regulator).
• Enhance pump performance by maintaining backpressure on the pump outlet (pump backpressure valve).
• Prevent gravity-induced siphoning through a pump, opening only when the pump is on (anti-siphon valve).
• NEW! Series TRVDT 3-port design...the features of our state-approved RVDT now in a 3-way valve!

One valve design provides many outstanding features...
• Offer wide range of pressure settings with sensitive operation.
• Provide smooth operation with higher flow.
• Fail-Dry safety feature (not available on RVD or RVTX).
• Each valve is individually tested prior to shipment.
• No wetted metals; all external fasteners are stainless steel.
• Maintenance-free designs.
• Designs for crystallizing liquids.
• Designs with no wetted elastomers for ultra-pure chemicals and water. Non-contaminating PTFE diaphragm designs.
• Factory pre-set if requested.
• Tamper-proof option.