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  • A photograph of a G3702LF surface-mounted cabinet.
  • A photograph of a G3707LF recess-mounted cabinet.
  • A photograph of a G3700 valve without a cabinet for reference.

Guardian G3702LF and G3707LF Tempering Valves, 34 Gallon Capacity w/ Mounted Stainless Steel Cabinet

Item #: G3702LF
This item has been discontinued. See note below.

Normal Availability: Discontinued

Product Description

APPLICATION NOTE: This product was discontinued in June, 2021.  The G604X series of tempering valves feature higher capacity, lower maintenance, and are more affordable; they are designed as the successor to the G370XLF series.

The G3702LF is a G3700LF tempering valve contained within a surface-mounted steel cabinet.  The G3707LF is a recess-mounted cabinet (select the "recess mount" checkbox above to select).  This series of valves is ideal use with a single emergency shower, single safety station or multiple installations of eyewash, eye/face wash, dual purpose eyewash/drench hose and drench hose units.

We carry a full line of tempering valves ranging in capacities from 6 to 44 gallons per minute (GPM). The valve must be properly matched to the flow capacity of the safety station in order to deliver water within the tepid range. 

Application: Tempering valve to blend hot and cold water to deliver tepid water. Valve has flow capacity of 3.0 to 34 gallons per minute (GPM). Valve can be used with emergency shower, safety station or multiple installations of eyewash, eye/face wash, dual purpose eyewash/drench hose and drench hose units.

Temperature Control: Valve has bimetallic thermostat that senses incoming water temperature and automatically blends water to 85 °F (29 °C). High temperature limit stop is set to 90 °F (32 °C). Valve has dial thermometer on outlet to monitor temperature of delivered water. Note: Valve may need to be adjusted when installed based on incoming water temperature. Refer to “Installation Instructions” for further information.

Fail Safe: In event of restriction or failure of hot water supply, internal bypass allows valve to deliver cold water to emergency unit. In bypass mode, valve will deliver 20 GPM of cold water at 30 PSI flow pressure. In event of loss of cold water supply, valve will close and not deliver water.

Flow Capacity: Refer to chart below for flow capacity of valve at specified pressure drops:

System Pressure Drop (psi) 5 10 15 20 25 30 35 40
Flow rate (gallons per minute) 2.0 2.7 3.5 4.5 5.5 6.5 7.5 8.5
System Pressure Drop (bar) 0.3 0.7 1.0 1.4 1.7 2.1 2.4 2.8
Flow rate (liters per minute) 7.6 10 13 17 21 25 28 32

Supply Temperature: Minimum hot water supply temperature is 140 °F (60 °C).

Supply Pressure: 30 PSI minimum supply pressure is required for proper operation of valve. Maximum supply pressure is 125 PSI. Maximum hot to cold water pressure differential is 5%.

Mounting: Tempering valve is mounted in either a surface mounted cabinet (G3702LF) or recess-mounted model with a 3/8” return (G3707LF). Both cabinets have a hinged door with lock and are constructed from 16 gauge Type 304 stainless steel.

Inlets: 3/4" NPT female hot and cold water inlets. Inlets can be rotated 360 degrees for top or bottom supply. Each inlet has integral water strainer, check valve and supply stop.

Outlet: 1" NPT female outlet.

Quality Assurance: Valve is completely assembled and water tested prior to shipment. Valve is certified to ASSE 1071. Valve is certified to meet low lead requirements of wetted surface area less than 0.25% lead by weight.

Application Note: Pursuant to ANSI Z358.1-2014, the water delivered by emergency equipment should be "tepid". Tepid is defined as moderately warm or lukewarm, and is generally considered to be between 60 °F (15 °C) and 90 °F (32 °C). However, in certain circumstances, a chemical reaction may be accelerated or otherwise affected by the water temperature. Please consult with a medical advisor to determine the optimum delivered water temperature prior to specifying, installing or using a tempering valve.

Tempering valves will not deliver the appropriate water temperature if the system has not been sized correctly. Please refer to the flow capacities and supply pressure requirements listed above when designing the tempered water system and selecting tempering valves.

Tempering valves, like all emergency eyewash and shower equipment, must be installed in accordance with the manufacturer’s instructions and maintained on a regular basis. Under ANSI Z358.1-2014, all emergency equipment should be activated weekly and inspected at least annually. Tempering valves should be treated the same and, in addition, must be regularly cleaned and cycled.


Documentation available:  G3707LF specification sheet w/ measured drawings, installation, operation and maintenance guide, and G3700 written specifications (Word format).

Common replacement parts: RK3800A rebuild kit and RK3800B checkstop kit.

Shipping weight - 43 lb (19.5 kg).

Warranty Information

2-year manufacturer limited warranty.

Other Details

Manufactured in: USA

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