Model TWBS.EWE

Model TWBS.EWE

Model TWBS.EWE Lead-free Emergency 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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Model TWBS.EWE Description

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
  • 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)
  • Modular low-lead brass design with internal check stops
  • Oversized 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)
  • 0.0 gpm cold water failure rate when tested according to ASSE 1071
  • Cold water by-pass valves are closed during normal operation, regardless of flow rate


CSA Certified to ASSE 1071, NSF 61, California Health and Safety Code 116875 (AB 1953) and applicable sections of CSA B125.3.

Buy America Act Information

The vast majority of Haws products qualify under the terms of the act. However, since different purchases often require subtly different responses, Haws recommends that the specific document requesting certification be sent to customer service for a specific answer.

Industry Standards Compliant

Model TWBS.EWE Components

Model TWBS.EWE Options & Accessories

0002582321

Pressure Gauge
Part 0002582321 temperature gauge with range from 0 to 200° F, and -20 to 95° C.
9200REC

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

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

Pricing Info

U.S. List Price: $2160.00  Pricing Terms

Model TWBS.EWE Downloads

Model 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). A 0.0 gpm hot water flow if cold supply fails. The modular low lead brass design with a one piece casting uses internal check stops, oversized 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 - 95° 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).

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