Deflagration and endurance burning proof pressure relief valve - C 9.10 N | KITO Armaturen | Philippopoulos s.a.
Deflagration and endurance burning proof pressure relief valve - C 9.10 N | KITO Armaturen | Philippopoulos s.a.

Deflagration and endurance burning proof pressure relief valve - C 9.10 N | KITO Armaturen

KITO DS/M-IIB3 Pressure Relief Valve, Type C 9.10 N

The KITO DS/M-IIB3 C 9.10 N is a pressure relief valve for storage tanks, integrating flame arrester elements. It is designed for tank breathing applications involving flammable liquids, where overpressure venting and protection against deflagration and endurance burning are required.

Application Scope

Certified for explosion group IIB3 media with MESG ≥ 0.65 mm and a maximum operating temperature of 60 °C. The IIB3 variant offers higher flame arresting requirements than IIA and IIB1, but media compatibility must be verified for each case.

Typical applications:

  • storage tank roofs,
  • tank vents for solvent or flammable liquid vapors,
  • installations requiring overpressure venting without flame return,
  • combination with separate vacuum relief valves, e.g., KITO VS/KS-IIB3.

Sizes, Flanges, and Set Ranges

Available sizes: DN 80, DN 100, DN 150, DN 200. Flanges: PN 16 for DN 80–150, PN 10 for DN 200. Optional ASME B16.5 Class 150 RF connection.

Set pressure ranges:

  • DN 80: 2–200 mbar
  • DN 100: 2–200 mbar
  • DN 150: 2–150 mbar
  • DN 200: 2.8–100 mbar

Higher set pressures require manufacturer confirmation.

Materials and Sealing Options

Standard construction:

  • body: carbon steel or stainless 1.4571
  • housing BEH-6-80-IIB3-K: cast steel 1.0619 or cast stainless 1.4408
  • seat and shaft: 1.4571
  • sealing: NBR, options for Viton, PTFE, EPDM, or metal
  • for set pressures ≥100 mbar: only PTFE or metal sealing

Flow Data and Standards

Flow rates are specified for air (ρ = 1.29 kg/m³) at 273 K, with 40% accumulation above set pressure, per DIN 4119. Type tested to EN ISO 16852 and CE marked per ATEX 2014/34/EU.

Standard (Options)
  • DIN
Connection (Options)
  • Flanged
Material (Options)
  • 1.4571
  • Steel
Pressure Rating (Options)
  • PN 10
  • PN 16

Datasheet and documents

Description

KITO® DS/M-IIB3-…

  • As breather/venting safety device incorporating an explosion and endurance burning proof flame arrester element for installation on storage tanks containing particular categories of inflammable liquids providing for reliable and safe operation whilst ensuring protection against any possible flashback.
  • The PRV allows the passage of hazardous excess pressure but will minimize the loss of gas/vapours depending on valve adjustment. Approved for all materials of the explosion group IIB3 with a maximum experimental safe gap (MESG) ≥ 0.65 mm and an maximum operating temperature of 60 °C.
  • Usually mounted on the top of the tank in conjunction with a vacuum relief valve, e.g. KITO® VS/KS-IIB3 (type sheet D 11 N).