Water Temperature Control—Emergency Fixtures—Thermostatic (Rada Z358-20)

Rada Z358-20

Rada Z358-20 has been designed specifically to provide temperature
controlled water to emergency fixtures as detailed in ANSI Z358.1-2009.

Z358-20 is a Thermostatic Mixing Valve of “sealed for life”disposable
cartridge construction. Compact design and topor bottom blended water
outlet make Z358-20 ideal for OEM, new construction and upgrade/retrofit
installations.

For Emergency Drench Showers. Rada Z358-20 will pass ANSI specified
minimum of 20 gpm/76 lpm (actual 23 gpm/87 lpm) and will flow a minimum
of 10 gpm (38 lpm) from direct cold water supply in hot failure mode at
40 psi (2.7 bar) maintained equal inlet supply pressure.

For Emergency Eye Wash Stations. For single or multiplefixture
installation, Rada Z358-20 will control accurately atflow rates from 20
gpm (76 lpm) to below 1 gpm (3.8 lpm).

In flow applications between 20 gpm (76 lpm) and 10 gpm(38 lpm),
Z358-20 will pass approximately 50% of original flow setting in hot
failure mode.

In flow applications between 10 gpm (38 lpm) and 5 gpm (19 lpm),
Z358-20 will pass approximately 80% of original flow setting in hot
failure mode.In flow applications below 5 gpm (19 lpm), Z358-20 will
pass approximately 95% of original flow setting in hot failure mode.

Operational Specifications

• Site Adjustable—Mechanical maximum-temperature limit stop and
  single-temperature locking features as a function of the temperature
  control handle design.
• Thermal shutdown feature is designed to protect user from unsafe
  water temperatures or hot water/chemical reaction should cold supply be
  interrupted during use.
• Unique constant cold water flow design ensures that in the event of a
  hot supply failure the Rada Z358-20 will allow cold water to flow to
  fixture.
• Unique constant cold water flow feature allows the inlet hot water
  supply to be set within a prescribed range, thus limiting the potential
  outlet temperature to a safe maximum in the event of misadjustment,
  unauthorized tampering or thermostat failure. This feature presumes that
  the correct initial commissioning was performed and that the cold water
  supply has not been interrupted.

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