Thermostatic Mixing Valve

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Thermostatic Mixing Valve


Model TWBS.EWE Lead-free AXION® Emergency Tempering Valve thermostatically mixes hot and cold water to provide a safe fluid supply for emergency eyewash equipment, with a flow rate of 12 gpm (45.4 L).

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Thermostatic Mixing Valve

Model TWBS.EWE, lead-free Emergency Valve (patent pending) thermostatically mixes hot and cold water to provide a safe fluid supply for emergency eyewash equipment. The valve contains a secondary high temperature limit valve to provide additional protection to the user in the event of main tempering valve malfunction. Additionally, to ensure a fail-safe water supply for emergency shower and eyewash stations, a series of cold water by-pass valves open in the event of hot water pressure loss. (No gauges supplied - ASSE 1071 standard recommends gauges be placed 5 to 8 feet (1.52 to 2.44 m) downstream for the most accurate temperature measurement.)

  • A flow rate of 1 to 12 gpm (3.8 to 45.4 L) for better temperature control across the operating range
  • AXION's superior design and technology provide a complete safety solution for increased victim comfort.
  • Lowest internal pressure drop for this class of valve (advantage where supply pressure is low)
  • Wax based thermostat technology for fast response time with proven highly reliable temperature control
  • Highest Cold Water Bypass flow rate in the industry (83% of rated tepid flow rate)
  • Lead-free brass valve design with internal check stops
  • Over-sized valve seats resist failures caused by foreign matter
  • A new and efficient shuttle design eliminates valve binding
  • A custom funnel design improves temperature control at low flow rates
  • Outlet temperature is factory set to 85° F (29° C)
  • Tempered water: High temperature limit is factory set to 87° F (30° C)
  • Cold water by-pass valves are closed during normal operation, regardless of flow rate
  • For important installation information, please read Scald Warning.
Listings: CSA certified per ASSE 1071, ANSI Z358.1, applicable sections of CSA B125.3, NSF/ANSI 372, NSF/ANSI 61-section 8, California Health and Safety Code 116875 (AB 1953).
Prop 65 Warning. For California Residents Warning: This product contains a chemical known to the State of California to cause cancer and/or birth defects or other reproductive harm. Please click here for more information.


  • Extended Warranty
  • Fully Assembled
  • In-Line Strainer
  • Internal Check Stops
  • Low Lead
  • System Certified
  • Thermostatic Protection


  • Buy American Act
  • CSA Certified

Interested in a custom safety solution?

Haws Integrated designs, manufactures, and installs water tempering systems for safety showers and eyewashes. Our team works directly with you to provide custom tempered water solutions for ANSI compliance and worker safety. Learn More

Optional Accessories
Temperature Gauge

Temperature Gauge

Part 0002582321 temperature gauge with range from 0 to 200° F, and -20 to 95° C.

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Recessed Cabinet

Recessed Cabinet

Model 9200REC recessed stainless steel cabinet for thermostatic mixing valves.


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Panel Kit

Panel Kit

Model PKEWE panel kit used for Haws TWBS.EWE mixing valve

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Surface Mount Cabinet

Surface Mount Cabinet

Model 9200SUR surface mount stainless steel cabinet for thermostatic mixing valve.


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TWBS.EWE Sample Specifications

Model TWBS.EWE (patent pending) is a thermostatic mixing valve that mixes hot and cold water to supply tempered water to emergency eyewash fixtures requiring flow up to 12 gpm (45.4 L). Unit employs a paraffin filled thermostatic mixing element. Lowest internal pressure drop where supply pressure is low, and a high Cold Water Bypass flow rate of 10 gpm (37.8 L). The improved lead-free brass design with a one piece casting uses internal check stops, over-sized valve seats, a shuttle design that eliminates valve binding, and a funnel design to improve temperature control with better mixing at low flow rates. Lime and calcium resistant components are used throughout. The outlet temperature factory setting is 85° F (26° C). Maximum operating pressure: 125 psi (8.62 Bar). Temperature adjustment range 60 - 90° F (16 - 35° C). Maximum inlet temperature: 180° F (82° C). Recommended inlet temperature: 140° F (60° C). Minimum inlet temperature: 120° F (49° C) Inlet 1/2" NPT(F). Outlet 3/4" NPT(F).

Pricing Information

$2,650.00  Pricing Terms

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