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TWBS.SHE - Thermostatic Mixing Valve

Brand: Haws Corporation
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Model TWBS.SHE, low-lead Emergency Valve (patent pending), thermostatically mixes hot and cold water to provide a safe fluid supply for emergency shower and 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.
Features
  • A flow rate of 1 to 74 gpm (280 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 (68% of rated tepid flow rate)
  • Low-lead 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
Model TWBS.SHE, low-lead Emergency Valve (patent pending), thermostatically mixes hot and cold water to provide a safe fluid supply for emergency shower and 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.
Features
  • A flow rate of 1 to 74 gpm (280 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 (68% of rated tepid flow rate)
  • Low-lead 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
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Specifications

Brand

Certifications

  • CSA Certified

Flow Rate

  • Maximum - 74 GPM (280 LPM)
  • Minimum - 1 GPM (4 LPM)

Hot Inlet Temperature

  • Maximum - 180° F (82° C)
  • Minimum - 120° F (49° C)

Recommended Hot Inlet Temperature

  • 140° F (60° C)

Cold Inlet Temperature

  • Maximum - 70° F (21° C)
  • Minimum - 40° F (4° C)

Adjustable Outlet Temperature Range

  • Maximum - 85° F (29° C)
  • Minimum - 60° F (16° C)

Operating Pressure

  • 125 psi (8.6 bar)

Factory Temperature Set Point

  • 85° F (29° C)

Cold Water Bypass

  • 50 GPM (189 LPM @ 30 psid)

Inlet Port

  • 1-1/4” (NPT(F))

Outlet Port

  • 1-1/4” (NPT(F))

Maximum Inlet Pressure Differential

  • ± 10 %
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Documentation

Installation Drawing

Limited Warranty

MasterSpec® Files

Operational / Maintenance Manual

Parts Breakdown Drawing

Specification Sheet

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