After water flow is activated at the shower or eyewash, the outlet water temperature will reach 85°F (29°C) when hot water arrives at the mixing valve. The tepid water mixing valve then blends the hot and cold water to produce an output of 85°F (29°C) water from 3 GPM (11.4 L/min) to 25 GPM (113.7 L/min) with a water inlet pressure of at least 40 PSIG (2.8 BAR).
At 50 GPM (189.3 L/min) pressure drop is 25 PSIG (1.7 BAR) therefore with a water inlet pressure of at least 60 PSIG (4.1 BAR) this unit is capable of enough flow for two combinations shower/eyewash stations running simultaneously.
OSHA and ANSI require all your emergency fixtures to provide tepid water for a minimum & continuous 15-minute cycle. Tepid is defined to be between 60°F (16°C) and 100°F (38°C). The Therm-O-Mix® WWM Tepid Delivery System can ensure your emergency equipment will meet these codes. Since the station does not require any electric power, it is suitable for explosion-proof environments and outdoor installations.
The Therm-O-Mix WWM tepid water mixing valve is typically used in facilities with only hot and cold water supply to provide tepid water delivery to safety shower and face/eyewash stations.
TheESS water heater is packaged with the Therm-O-Mix®/WWM specifically designed, tested, and proven in emergency safety shower/face/eyewash applications. When you specify and install a ThermOmegaTech® tempered water system, you can be confident that it will be a safe and dependable source of tepid water for an emergency drench system.
Operation – How the Safety Shower Tempered Water System Operates
Packaged with the ESS is a triple-redundant thermostatic valve explicitly designed for emergency safety shower/face/eyewash applications. The Therm-O-Mix®/WWM is factory mounted and piped to the water heater. After the water flow is activated at the emergency station, the outlet water temperature from the ESS will be maintained at 85°F tepid temperature.
The ESS Emergency Shower Water Heater can achieve the high-volume demand required for a safety drench system by mixing the 170°F water in the tank with incoming cold water. The mixing valve of our tempered water system meets OSHA and ANSI requirements and can provide a constant 85°F output regardless of inlet pressure and temperature variations. The temperature is factory set, making the valve tamper-proof.
The water temperature is not warm enough to open skin pores and not cold enough to deter usage. The valve can provide a full range of flows from 0.4 GPM for an eyewash to the combined 23 GPM flow for a simultaneous demand for a shower, eyewash, and face wash system.
The Therm-O-Mix®/WWM incorporates a pressure-sensing controller with a thermal actuator that senses the water pressure on the hot and cold water inlet connections. If the hot water pressure is absent, the actuator overrides the mixing valve, allowing cold water flow. If no cold-water pressure is available at the mixing valve inlet, the hot water port will close to prevent overheated water from exiting the mixing valve.
The valve also includes a safety override feature that continuously senses the final mixed water temperature. If the final water temperature is overheated, the valve automatically closes the hot water port and fully opens the cold water port. In any of these fault conditions, the ESS will continue providing a full flow of water per the ANSI standard with no additional pressure drop.
The ESS emergency shower water heater packaged with the WWM water/water mixing valve is used for emergency safety shower and face/eyewash stations in manufacturing, food production, chemical, pharmaceutical, petrochemical, and other facilities where personnel can be exposed to hazardous or corrosive materials.
ThermOmegaTech® offers a range of tepid water systems for safety showers to meet your needs. From our steam and water mixing Therm-O-Mix® Station, hot and cold water mixing Therm-O-Mix®/WWM valve, or our ESS tepid water heater, your employees will always have access to safe, reliable, and comfortable showers when they need them most. Contact us to make our safety shower tempered water system part of your workspace or facility.
Factory packaged with the Therm-O-Mix Station®/WWM
All electrical operating controls are factory selected and wired to ensure reliable operation
½” Hydrastone cement lining provides tank longevity
Fully insulated with 3″ thick polyurethane foam to minimize standby heat loss
Copper-silicon alloy tapings cannot rust or corrode
High impact composite jacket cannot rust or corrode and eliminate potential damage during installation and transit
Compliant with OSHA and ANSI tepid water standards
Self-operating mixing valve prohibits the delivery of overheated water to prevent scalding
Mixing valve designed to ensure a constant flow of tepid water even when an accident causes a loss of electric power
Reduces risk of Legionella because water is stored at an elevated temperature
The HST (High Sample Temperature) automatic thermal shutoff valve senses the sample temperature after the sample cooler. Under normal conditions, the valve is wide open, so the sample fluid passes through the valve. The valve’s internal thermal actuator is always sensing the fluid temperature. If the temperature exceeds the valve’s set point, the HST will close to protect expensive and delicate analyzers and other instruments downstream from over-temperature damage.
The HST will only open again once the sample temperature falls back below the valve’s set-point. Low coolant flow, total loss of cooling water, or unusually high sample temperatures are typical reasons the HST self-operating protective device should be considered for your high-water temperature shutoff system.
Excessively hot samples can cause damage to expensive and sensitive hardware and electronics. For process analyzers and similar instrumentation, it is crucial to ensure that the process sample fluids are consistently below the maximum allowable temperature for such instruments.
Sample coolers are commonly used to reduce sample temperatures to acceptable limits. In the event of a loss of cooling fluid to the sample cooler or if the desired sample temperature is exceeded, the HST thermal shutoff valve will close to prevent equipment damage.
The TV/SC-A (Tube Valve/Steam Control-Ambient Sensing) is a Steam Tracing Control Valve that can be used to turn on steam, air, gas, or liquids compatible with Teflon® and stainless steel in response to ambient temperature changes to protect piping and instrumentation from freeze damage.
The thermostatic actuator located at one end of the TV/SC-A (thermally isolated from the body of the valve), will automatically open or close within a 10°F (5.6°C) differential (e.g. 35°- 45°F) to provide an optimal fluid temperature. The steam tracing control valve is normally closed and will begin to open to inject steam or another fluid when the ambient temperature drops below the valves’ set-point. The valves will close again once the air temperature rises back above the valves’ set-point, saving thousands of dollars in wasted operating costs.
There are hundreds of applications for this compact, self-contained, automatic steam tracing control valve.
Most often used in steam tracing applications, these self-actuating valves can also be used in the operation of pneumatically operated pumps for injection of anti-freeze liquids and instrument enclosure temperature control (See ITCH product sheet).
The thermostatic actuator located at the one end of the US/S-X (Ultra Surface Sensing) temperature control valve may be installed immersed in the process fluid or mounted non-invasively to the pipeline with the optional band-o-let fitting. This ultra sense control valve allows the wax actuator to be in contact with the process directly or through thermal conduction to sense the temperature and regulate the inflow of heating media. Input temperatures or steam supply can vary widely, but the control temperature is maintained within desired limits.
The thermal actuator automatically and continuously monitors the temperature and will modulate open and closed to keep the process fluid heated at a specified temperature within a 10°F differential. For example, a 90°F valve would open at 90°F and close at 100°F, keeping the process fluid between 90 – 100°F.
The compact self-operating ultra sense control valve can maintain very tight temperature control of any number of control loops using steam, liquid phase heat transfer media such as Dowtherm®, hot water, hot oil, glycol, etc. In general, they can be used whenever accurate, low cost control is required.
The reverse-acting model, US/S-XR can be used to control cooling media to economically remove heat from equipment or a process.
The self-actuating, thermostatic TV/US-X (Tube Fitting/Ultra Surface Sensing) sample cooler control valve operates the same as the US/S-X valve where the sensing end is either immersed in the process fluid or mounted non-invasively via a hose clamp on the outside of the pipeline. The two differences are that the heating media is connected with tube compression fittings instead of pipe fittings and the Cv is around half of the US/S-X valve.
When immersed in the process fluid, the thermal actuator in the valve automatically senses when the temperature rises above the valve’s set-point and modulates closed to keep the process fluid heated at a specified temperature within a 10°F differential. For example, a 90°F valve would open at 90°F and close at 100°F, always keeping the process fluid between 90 – 100°F.
These self-contained and compact thermostatic sample cooler control valves can maintain very tight temperature control of any number of control loops using steam, liquid phase heat transfer media such as Dowtherm®, hot water, hot oil, glycol, compressed air, etc. Sample heating applications are commonly controlled by the TV/US-X, but they can be used whenever accurate, low cost control is required.
The reverse-acting model, TV/US-XR (Tube Fitting/Ultra Surface Sensing) can be used to regulate flow to protect a system or process from overheating by operating on rising temperatures to allow cooling fluid in.
A thermal wax actuator mechanically operates ThermOmegaTech’s self-operating HAT (heat actuated trap) valve. This thermostatic actuator senses the fluid temperature and will modulate the valve open to initiate flow if the temperature falls below the valve’s set point. Once the fluid temperature increases back to the set-point, the valve will modulate closed to control flow. HAT valves are available with built-in leakage to allow bypass flow.
A subcooling steam trap: discharges condensate to an unpressurized outlet, reducing problems associated with overheating.
Regulating temperatures in glycol heat tracing: maintains the discharge temperature for glycol heat tracing used for winterization processes.
Freeze protection for condensate systems: The heat-actuated trap valves open when temperatures fall to allow condensate to discharge before freezing.
High-temperature for commercial aircraft galleys: HAT valves are installed in airplane galleys where manifolds connect coffee makers and faucets to prevent high-temperature water from traveling to the cold-water lines and scalding passengers and/or crew.
Regulating temperatures of tank heating coils: HAT valves limit the temperatures of the heating element by closing before coil temperatures are too high to reduce the risk of over-temperature damage.
Sampling system safety shut-off: HAT valves will remain open as long as sample temperatures are under the valve’s set-point. If the sample temperature increases, the valve will close, shutting off the flow and protecting analyzing equipment from damage.
Utilizing a thermostatic wax actuator, the TV/HAT (Tube Valve/Heat Actuated Trap) freeze protection valve responds only to fluid temperature to control a system. After condensate forms and cools to the valve’s set point, the valve modulates the flow to maintain a constant condensate discharge temperature. During start-up, the TV/HAT is wide open for rapid venting and initial heat-up and then will adjust based on fluid temperature. After shutdown, the valve is self-draining to eliminate freeze damage.
For heating of temperature-sensitive instruments or process fluids, the reduced temperature available for tracing simplifies operations and eliminates overheating problems. For other heat transfer fluids, the TV/HAT freeze protection valve maintains a constant discharge temperature, thus providing the benefits of accurate process temperature control and improved efficiency.
TV/HAT valves are ideal for use in conjunction with tracer tubing and tracing systems using pre-traced tubing bundles. These valves are optimal for replacing conventional steam traps on winterization tracing, instrument tracing, condensate return system freeze protection, tracing for processes under 150°F (65°C), and other applications requiring in-line flow control based on temperature.
The reverse-acting US/S-XR (Ultra Surface Sensing) sample cooler temperature control valve may be installed with the valve’s thermal actuator immersed in the process line or mounted non-invasively to the piping with the optional band-o-let fitting. This allows the thermal wax actuator to be in contact with the process directly or through thermal conduction to regulate the flow of the cooling media.
If the fluid is above the desired set-point temperature, the valve will open allowing cooling fluid to flow until the process flow temperature drops to 10°F below the set-point. Once this occurs the valve will modulate closed again providing an optimal environment for the process.
These compact self-contained sample cooler temperature control valves can be used to control cooling media to economically remove heat from equipment or a process. In general, they can be used whenever accurate, low-cost control is required, but a common application is controlling cooling media flow to a sample cooler in response to sample temperature.
The US/S-X direct-acting valve can also be used to regulate the flow of heating media to prevent a process from overheating.
The reverse-acting TV/US-XR (Tube Fitting/Ultra Surface Sensing) sample cooler control valve opens on rising temperatures to allow cooling fluid in to keep a process from overheating. The valve may be installed so the valve’s thermal wax actuator is immersed in the process fluid or mounted non-invasively to the pipeline with a band-o-let fitting. The TV/US-XR operates the same way as the US/S-X valve, but it has tube compression fittings instead of pipe fittings and the Cv is around half of the US/S-XR valve.
The wax actuator automatically and continuously senses the process temperature either directly or through thermal conduction to modulate the valve open/closed and regulate the flow of cooling media.
These compact self-contained sample cooler control valves can be used to control cooling media to economically remove heat from equipment or a process. Controlling air flow to a vortex cooling device and controlling cooling media flow to a sample cooler in response to sample temperature are common applications.
The direct-acting model, TV/US-X is designed to monitor and control the flow of heating media to protect facility pipelines from freezing.
The ITCH (Instrument Temperature Control Heater) Assembly is 100% mechanical, operating solely based on ambient and/or fluid temperature changes controlled by a wax motor.
The thermostatic wax actuator located at one extreme of the TV/SC-A valve operates like the thermostat in an oven, automatically senses the internal enclosure temperature, and regulates steam flow to the heater coil to maintain the desired temperature. The TV/HAT at the steam inlet keeps the steam supply hot to prevent freezing even when the TV/SC-A valve is closed. The TV/HAT at the coil outlet regulates condensate discharge temperature for maximum economy with minimized overheating potential.
The ITCH Heater Assembly comes complete with a steam coil, mounting bracket, and TV/SC-A valve assembly, two TV/HAT valves, and two weather-tight bulkhead fittings for 3/8 tubing connections.
The TV/SC-A and TV/SC-I valves (with external connections) are also available separately if you do not require a complete assembly.
The ITCH Assembly, instrument temperature control valve assures accurate temperature control in an instrument or analyzer enclosure. It will maintain enclosure temperature accurately over a wide range of ambient temperatures with steam supply pressures from 15 PSIG (1 BAR) to 200 PSIG (13.8 BAR) without danger of overheating delicate instruments.
This self-contained unit provides a reliable, economical alternative to costly, hazardous electric heating. No special NEMA-7 or 9 housings are required even in potentially explosive environments.
The reverse-acting TV/SC-IR (Tube Valve/Instrument Enclosure) is Self-Actuated Temperature Regulators designed to open on rising temperature to regulate the flow of cooling media to an enclosure. The thermal wax actuator end of the valve is installed into the wall of the instrument enclosure to continuously senses the ambient temperature within the enclosure.
When the temperature rises above the valve’s set-point it will automatically modulate open to allow the injection of the cooling media. The valve will modulate closed again once the ambient temperature is within 10°F (5.6°C) of the open set-point (Example: a 75°F valve would open at 75°F to allow the insertion of the cooling media and close at 65°F, keeping the enclosure interior between 75 – 65°F).
The TV/SC-IR Self-Actuated Temperature Regulators can be used to keep an enclosure cool via a vortex cooler to protect expensive analyzers and instrumentation from overheating. For example, a 90°F valve would open at 90°F to allow the compressed air into the vortex cooler valve, which then spins the air at high velocity creating a hot and cold fraction of air. As cold air fills the enclosure, the hot air will be expelled outside, maintaining a desired temperature with the enclosure.
For heating applications, the TV/SC-I direct-acting valve opens on falling temperatures to regulate the flow of steam into the enclosure to maintain a desired temperature within the enclosure and to protect instrumentation from freeze damage.
The TV/SC-I (Tube Valve/Steam Control Instrument Enclosure) valve is installed into the wall of the enclosure so that the thermal actuator end is inside to sense the ambient temperature. The thermostatic wax actuator regulates the steam supply to the heater to accurately maintain the desired temperature, operating like a thermostat in an oven.
Heat radiating from the steam coil heater reaches the actuator and will cause it to quickly shut off the steam supply when the desired temperature is reached, regardless of outside ambient to provide the optimal temperature within the enclosure and reduce wasted steam costs.
The TV/SC-I is often used for freeze protection with steam as the media, to maintain optimal temperatures for instrumentation and analyzer equipment within an enclosure. This self-contained compact thermostatic control valve is a reliable, economical alternative to costly, hazardous electric heating.
In cooling applications, the reverse-acting TV/SC-IR can be used to regulate the flow of glycol, water, air or other cooling media.
The thermostatic mixing valve/diverting valve is designed to maintain or proportion flow based on temperature in mixing or diverting applications.
Inmixing applications where a controlled temperature outlet is required, the 3-way control valve (M/D) will modulate between the hot and cold inlet feeds (ports “B” and “C”) to mix your fluid to the desired specified temperature exiting the “A” port.
Indiverting applications where the fluid must be directed from one section of a system to another, the thermal diverting valve (aka thermal bypass valve) will modulate inlet fluid temperature and divert return flow through a cooler/ heat exchanger or bypass it to a reservoir/ bypass loop when fluid temperatures are satisfied. This action assures rapid system warm-up, accurate control of fluid temperature, and reduced back pressure in the return.
Mixing and Diverting Thermal Valves
Mouse over an image of a thermostatic mixing valve/diverting valve to animate.
Installed in diverting mode, the valve’s thermal actuator will sense the fluid temperature and automatically divert or switch the inlet flow to either of the two outlet ports depending on the valve’s specified temperature requirements.
The TBV cartridge can be integrated into a 4-way manifold to monitor inlet flow and divert the fluid based on temperature. Cooler fluid goes through the valve bypass, while hotter fluid goes through the system’s cooler.
Installed in mixing mode, the mixing valve’s thermal actuator will sense the temperature to automatically proportion the flow of hot and cold fluid from two inlet ports to produce the desired outlet port temperature.
Cooling water control for radiator or heat exchanger
Direct cooling with raw water
Direct injection water heating
Electronics system cooling
Engine and compressor cooling system
Hydraulic fluid cooling systems
Hydraulic power units (HPUs)
Hydraulic thermal bypass
Loop-type circulation systems
Lube oil cooling control
Lube oil thermal bypass
Temperature control for baths, wash basins, and sinks
As the fluid temperature increases to within the operating range of theECONO/HAT-RA, the valve’s internal thermal actuator modulates it open to discharge the over-temperature fluid. If the temperature exceeds the acceptable range, the thermal relief valve will continue to modulate open, allowing additional fluid discharge. As the outlet temperature falls, the thermal safety valve modulates toward the closed position, reducing flow.
This modulating action maintains a relatively constant fluid temperature even as operating conditions vary. The water discharge can be collected, reused, or repurposed to reduce waste.
The ECONO/HAT-RA valve is primarily used for thermal relief on booster pumps to keep them cool during idling. It can also be used to control cooling water outlet temperature or flow of cooling water, glycol, or other cooling media in applications requiring economical heat removal from equipment or a process.
Since ECONO/HAT-RA valves open on rising temperatures, they can be used in other thermal relief valve applications. These pump thermal relief valves save space, install in seconds, and eliminate the use of extra, expensive, and time-consuming piping. The unique ram-type plug & seat provide reliable, tight shutoff longer than any other design. As a leading thermal relief valve manufacturer, we are committed to delivering versatile products to suit the demands of our customers’ facilities.
Self-operating – no external power source required
Protects pumps and pump seals from over-temperature damage
Prevents scalding water from being distributed to users
100% mechanical thermal relief for booster pumps and cooling jackets
Unaffected by pressure variations
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1/4” ECONO/HAT-RA M/F
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1/4” ECONO/HAT-RA M/F SS
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