Fine pressure adjustment, right-angle, 3-port design.


  • Fine pressure adjustment.
  • CNC precision machined parts.
  • Cost effective and reliable.
  • Variety of materials available.
  • Right-angle, 3-port design.

LMI pressure relief valves operate when the system pressure rises above the set pressure of the valve to protect systems from damage due to blockages or excessive pressure situations.

Inside the valve, a spring holds a diaphragm against the valve seat until a preset pressure is exceeded, then the diaphragm is forced up and the material in the system is forced out of the relief port. The valve is set at 65psi at the factory but is easily field adjustable.

Model NumberMfg.DescriptionConnection Size/TypeMaterial
35635LMIPressure Relief Valve1/4" NPTPVC
35636LMIPressure Relief Valve1/4" NPTPolypropylene
35844LMIPressure Relief Valve1/4" NPTPVDF
35845LMIPressure Relief Valve1/4" NPT316 SS
35639LMIPressure Relief Valve1/2" NPTPVC
35640LMIPressure Relief Valve1/2" NPTPolypropylene
35848LMIPressure Relief Valve1/2" NPTPVDF
35849LMIPressure Relief Valve1/2" NPT316 SS
35852LMIPressure Relief Valve1" NPTPVC
35853LMIPressure Relief Valve1" NPTPolypropylene
35853LMIPressure Relief Valve1" NPTPolypropylene
35854LMIPressure Relief Valve1" NPTPVDF
35855LMIPressure Relief Valve1" NPT316 SS