Thermostatic Mixing Valve - TWBS.EWE

Thermostatic Mixing Valve

Model TWBS.EWE, low-lead 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)
• 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
• 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.

Certifications

• CSA Certified

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 low-lead 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).

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