Emergency Valve Sizing Guide

Product Type

Quantity

Wall Mounted, Pedestal Mounted, Laboratory Units

Eyewash Only

Eye/Face Wash Only

Horizontal or Vertical Supply and Free Standing Drench Showers**

Shower w/20 GPM Flow Restrictor

Shower w/30 GPM Flow Restrictor

Combination Units**

Eyewash & Shower w/20 GPM Flow Restrictor

Eyewash & Shower w/30 GPM Flow Restrictor

Eye/Face Wash & Shower w/20 GPM Flow Restrictor

Eye/Face Wash & Shower w/30 GPM Flow Restrictor

TOTAL GPM Requirement:
TMV GPM rating should exceed the GPM Requirement

GPM

** All Showers need a flow restrictor installed to utilize a TMV
  20 GPM Flow Restrictor, Part #S19-866
  30 GPM Flow Restrictor, Part #S19-823
 
Calculate Hot Water Flow Requirement for this system.

AVAILABLE EFX TMVS

Incoming Pressure To Valve

Part #

30 PSI

45 PSI

60 PSI

Pressure Drop Thru Valve

S19-2000  (Technical Data)

7.8 GPM

9.4 GPM

11.6 GPM

PSI

S19-2100  (Technical Data)

36 GPM

44 GPM

50 GPM

PSI

S19-2200  (Technical Data)

67 GPM

83 GPM

95 GPM

PSI

S19-2300  (Technical Data)

103 GPM

127 GPM

148 GPM

PSI

To purchase one of the products above, please find your nearest Bradley Sales Location.

Key information for sizing Thermostatic Mixing Valves for Emergency Fixtures:

1. Determine incoming pressure. Valve flow depends on pressure supplied to valve.
2. Per ANSI, a minimum of 30 PSI must be supplied to Emergency Eyewash and Shower Equipment.
3. To use a TMV, a minimum of 2 GPM must be supplied to the unit.
4. EFX items should be on a dedicated supply line so supply will not be disrupted.
5. The number of units attached to a Thermostatic Mixing Valve will depend on location and flow requirements.
6. The layout of TMVs must be determined by end user, or installer/plumber.
7. If calculated amount is higher than valve GPM rating at incoming pressure, additional valves must be used.