poppet valve / lever control / pressure-reducing / for boilers
SMS-7100 Uni Klinger Limited



  • Type:


  • Operation:

    lever control

  • Function:


  • Applications:

    for boilers

  • Other characteristics:

    high-flow, relief, ATEX

  • Temperature:


  • Pressure:


  • DN:

    Max.: 300 mm

    Min.: 25 mm


The SMS-7100 direct spring operated pressure relief valves has been designed to protect against excess pressure steam boilers and to provide superior performance.

These valves are designed and manufactured according to 97/23/CE P.E.D. and ASME I and are approved according to 97/23/CE P.E.D. These valves have many other homologations and approvals; ATEX, AQSIQ for China, GOST R for Russia and others

Double blow-down ring guarantees the over-pressure and the reseating-pressure required on section I of the ASME code. Special design of the disc eliminates the distortion due to thermal stress for maximum seat tightness. Available with open or closed bonnet.

Orifice Sizes: From “D” to “T “

Connections: From NPS 1×1 ½ to NPS 8×12 – DN 25×40 to DN 200×300

Inlet flanges ratings: Up to Class 2500 – PN 320

Features and benefits

– Valve bodies are heavy duty design

– Full nozzle design

– Flanges can be manufactured according to a wide range of standards

– Dual blow-down ring for more precise performance: 3% over pressure and 4% blow-down

– All pressurized parts are hydraulically tested

– Seats lapped to optical flatness for tight shut-off

– The high flow coefficients allow the most economical sizing of the valve

– Among foreign certifications

– Ease maintenance

– Proven reliability