Operation

The DTV can be used in applications where a high temperature discharge flow to a drain or sewer must be tempered with cold water. The DTV is installed into the drain line such that the hot effluent passes over the thermal actuator of the DTV and this thermal actuator controls the cold-water inlet port. If the hot effluent is above the specified set point, the DTV opens to allow injection of cold water. As the hot effluent cools, the DTV automatically modulates to reduce the cold-water inlet flow. At about 10°F below the full open temperature, the cold-water inlet is fully closed to conserve water.

The DTV provides a convenient, economical, and easy to use method of tempering hot effluent flows. Since the DTV is open only when the effluent exceeds the specified set point temperature, it also conserves water by automatically turning off cold water when not needed.

Benefits

• Compliant with drain temperature limitations of plumbing codes
• Prevents damage to PVC piping due to over-temperature conditions
• Minimizes water waste
• Easy to install
• Adaptable to almost any drain size

Design Features

• Rugged, clog resistant valve design
• Install using standard pipe fittings and tools
• Operates in any orientation
• Modulates to conserve cooling water
• Effluent tempering capacity limited only by cold water flow rate through DTV

Operation

A thermostatic element inside the valve senses temperature and if this falls below the setpoint, the valve modulates open to allow flow. When the temperature increases to near the setpoint, the HAT (Heat Actuated Trap) valve modulates closed. HAT valves are available with built-in leakage to allow bypass flow.

Benefits

• Controls fluid return temperatures – ideal for glycol tracing
• Maintains constant discharge temperatures
• Improves system efficiency
• Unaffected by pressure variations

Design Features

• Stainless steel body, fittings, spring, and plug
• Corrosion resistant – long service life
• Exclusive Thermoloid® sensor/controller
• Operates in narrow temperature band
• Compact low mass – fast response
• Two wrench flats for easy installation
• Ram-type plug for reliable shut-off

Typical Applications

• To control temperatures in glycol heat tracing systems, HAT valves will maintain the discharge temperature. When glycol temperature exceeds the setpoint, the valve will modulate closed. As heat loss occurs and glycol cools to below the setpoint, the valve will open to allow warmer glycol to circulate.
• HAT valves can act as freeze protection for condensate systems. The valves open when temperatures fall to allow condensate to discharge before freezing.
• In commercial aircraft, high temperature water can unexpectedly travel to the cold water lines. HAT valves on cold water lines will limit flow when excessive temperatures are detected, preventing scalding of passengers and crew.
• HAT valves used on tank heating coils limit the temperatures of the heating element. By closing before coil temperatures are too high, the valves reduce the risk of over-temperature damage. When used as a subcooling steam trap, HAT valves reduce problems associated with overheating.
• When used as a sampling system safety shutoff, HAT valves will remain open as long as sample temperatures are under the setpoint. If the sample temperature increases, the valve will shut off, protecting analyzing equipment from damage due to high temperature.

Product Description

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.

Operation

TV/HAT valves responds only to temperature. After condensate forms and cools to near the set point, the valve modulates the flow to maintain a constant condensate discharge temperature. The valves are wide open at start-up for rapid venting and initial heat-up and are self-draining after shutdown, 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, TV/HAT valves maintain a constant discharge temperature, thus providing benefits of accurate process temperature control and improved efficiency.

Benefits

• Eliminates live steam losses
• Downstream actuator for greater sensitivity
• Unaffected by pressure variations
• Wide choice of setpoints
• Operates in any position

Design Features

• Stainless steel body, fittings, spring and plug
• Corrosion resistant – Long service life
• Compact, low mass for fast response
• Ram-type plug for tight reliable shutoff
• Operates in narrow temperature band
• Easy to install

Product Description

A safety hazard for plant personnel can occur when utilizing safety showers or eyewash stations if overheating of the pipes caused by solar radiation or steam/electric tracing results in extremely high temperatures at the point of use.

The HAT/SP valve can be installed at the highest point of the system to prevent an individual from being scalded when they activate the safety shower or eyewash unit. The valve will open to establish flow until the over-temperature water is eliminated and then it will then modulate closed.

Operation

The HAT/SP valve continually senses and automatically bleeds excessively hot water from safety shower and eyewash systems. Scald protection is provided with minimal water consumption. The unique plug and seat design offers the most reliable, tight shutoff available.

The HAT/SP-105 will initiate flow when the thermostatic actuator senses 98°F (36.7°C) and will remain open as long as the discharge water temperature is above 95°F (35°C).

In standard flow, the actuator will sense ambient temperature to initiate flow and then respond to water temperature; in reverse flow, the actuator will sense water temperature.

Benefits

• HAT/SP temperatures up to 105°F meet ANSI Z258.1 standards
• Protects safety showers from over-temperature conditions, keeping personnel safe
• Long service life
• Fast response
• Discharges the minimum amount of water required to keep water temperature within safe limits

Design Features

• Stainless steel body, fittings, spring, and plug
• Corrosion resistant
• Exclusive Thermoloid® sensor/controller
• Compact, low-mass
• Two wrench flats for easy installation
• Ram type plug for reliable and tight shutoff
• Installs in any orientation

Product Description

A safety hazard for plant personnel will occur through solar radiation or overheating caused by steam or electric tracing resulting in extremely high temperatures at the point of use. The IC/SP valve prevents this safety hazard. When installed in safety showers, eyewash stations, and other locations exposed to the same source of overheating as the system, the IC/SP will be heated just as the pipe system. The valve will open to establish flow until the overtemperature water is eliminated and it will then modulate closed.

Operation

IC/SP valves are installed within the heated system. The IC/SP-105 will initiate flow when the thermostatic actuator senses water temperature of 98°F (36.7°C) and will remain open as long as the discharge water temperature is above 95°F (35°C).

Benefits

• IC/SP temperatures up to 105°F meet ANSI Z258.1 standards
• Protects safety showers from over-temperature conditions, keeping personnel safe
• Long service life
• Fast response
• Discharges the minimum amount of water required to keep water temperature within safe limits

Design Features

• Available in brass or stainless steel body
• Stainless steel fittings, spring, and plug
• Corrosion resistant
• Exclusive Thermoloid® sensor/controller
• Compact, low-mass
• Two wrench flats for easy installation
• Ram type plug for reliable and tight shutoff

Operation

The GURU® DL2.1 is the most widely used and proven locomotive freeze protection valve in the world. It may be thought of as an automatic freeze-out plug with one important difference: The stainless steel GURU® Cartridge releases itself from its body at a pre-set water temperature (35°F or 40°F), rather than being forced out by the tremendous pressure of expanding ice. This provides almost a full one inch bore to rapidly drain a typical locomotive’s engine coolant system before damage can occur.

Benefits

• Will not trip or dump while locomotive is running
• Fully automatic – it never forgets to activate freeze protection
• Completely mechanical – No electrical or air connections
• Not affected by air flow or air temperature surrounding valve – releases only when cooling water reaches setpoint
• Rapid draining
• Easy system refill
• Models available to convert existing freeze protection
• Easily tested in field
• Slotted actuator feature prevents nuisance dumps when refilling cooling system with cold water
• Unit automatically rearms after filling and reheating
• Optional domed anti-tamper cap eliminates ability to tamper with the valve resetting stem

Design Features

• Actuator sensing surface is the only wetted part
• Long service life: All moving parts are stainless steel
• Design excludes cooling water chemicals and other debris from moving parts
• Easy maintenance
• Several body styles available for various applications: 1-1/4 NPT, tee, and flanged tee.
• Paint mask minimizes accidental paint-ins
• Knob on cartridge for easy installation and removal even in awkward locations
• Choice of release temperatures: 35°F or 40°F

Applications

• Locomotive engine and compressor set cooling systems
• Stand-by diesel heating circulators
• Back-up protection in event of shut-down
• Hot water cab heater lines
• On-board tanks and piping

Operation

The GURU® DL2.1 CH and CHS may be thought of as an automatic freeze-out plug with one important difference: The stainless steel GURU® Cartridge releases itself from its body at a pre-set water temperature (35°F or 40°F), rather than being forced out by the tremendous pressure of expanding ice. This provides almost a full one inch bore to rapidly drain the typical compressor before damage can occur.

Benefits

• Will not trip or dump while locomotive is running
• Fully automatic – it never forgets to activate freeze protection
• Completely mechanical – No electrical or air connections
• Not affected by air flow or air temperature surrounding valve – releases only when cooling water reaches setpoint
• Rapid draining
• Easy system refill
• Models available to convert existing freeze protection
• Easily tested in field
• Slotted actuator feature prevents nuisance dumps when refilling cooling system with cold water
• Unit automatically rearms after filling and reheating
• Optional domed anti-tamper cap eliminates ability to tamper with the valve resetting stem

Design Features

• Easily retrofits into water cooled air compressor heads.
• Flanged and 2” NPT threaded styles
• Actuator sensing surface is the only wetted part
• Long service life: All moving parts are stainless steel
• Design excludes cooling water chemicals and other debris from moving parts
• Easy maintenance
• Paint mask minimizes accidental paint-ins
• Knob on cartridge for easy installation and removal even in awkward locations
• Choice of release temperatures: 35°F or 40°F

Applications

• Both are used for water-cooled air compressor head freeze protection.
• The GURU® CHS adapts to Gardner Denver’s compressor set cooling systems. Most common on EMD’s SD70 locomotives.

Operation

The Magnum GURU® Plug is a higher discharge capacity version of the standard GURU® Plug. The Magnum GURU® Plug is a self-operating thermostatic drain valve that responds to engine coolant temperature and will pop open and drain when coolant reaches the setpoint (35°F or 40°F). This provides almost a full 1.2 inch bore to rapidly drain a locomotive before freeze damage can occur.

Benefits

• Drains twice as fast as the standard GURU® Plug
• Will not trip or dump while locomotive is running
• Straight SAE threads and O-ring seals provide for easy field maintenance and testing
• Easy installation
• Completely mechanical – No electrical or air connections
• Not affected by air flow or air temperature surrounding valve – releases only when cooling water reaches setpoint
• Easy system refill
• Models available to convert existing freeze protection
• Slotted actuator feature prevents nuisance dumps when refilling cooling system with cold water
• Unit automatically rearms after filling and reheating Actuator sensing surface is the only wetted part
• Optional domed anti-tamper cap eliminates ability to tamper with the valve resetting stem

Design Features

• Actuator sensing surface is the only wetted part
• Design excludes cooling water chemicals and other debris from moving parts
• Long service life: All moving parts are stainless steel
• Available in modified 1-1/4” NPT tee or flanged tee body styles
• Paint mask minimizes accidental paint-ins
• Knob on cartridge for easy installation and removal even in awkward locations

Applications

• Locomotive engine cooling systems
• Stand-by diesel heating circulators
• Back up protection in event of shutdown
• On-board tanks and piping

Operation

The 1″ GURU PC® valve is self-contained and drains water bearing systems automatically before freeze damage can occur by monitoring ambient temperatures. Freezing conditions, which put water tanks and piping at risk for freeze damage, occur when the car heat is turned off for switching locomotives or even brief layovers. Since the valve is completely mechanical, no electrical or air connections are required. When used with the heater assembly, we provide a 5 foot (1.5m) cable and wiring diagram for hard wiring, or any various plug of your choice.

Benefits

• Eliminates costly freeze damage in passenger cars
• Easy installation
• Completely mechanical, no electrical or air connections
• Minimal maintenance required
• High flow design for rapid draining
• NSF 61/372 certified by a third party
• Shock & Vibration tested by a third party

Design Features

• Low lead brass/bronze
• Self-operating valve
• Dual port seals
• No power or air required when used without heater
• Inline serviceable

Operation

The ¾” GURU PC® valve is self-contained and drains water bearing systems automatically before freeze damage can occur by monitoring ambient temperatures. Freezing conditions, which put water tanks and piping at risk for freeze damage, occur when the car heat is turned off for switching locomotives or even brief layovers. Since the valve is completely mechanical, no electrical or air connections are required. When used with the heater assembly, we provide a 5 foot (1.5m) cable and wiring diagram for hard wiring, or any various plug of your choice.

Benefits

• Eliminates costly freeze damage in passenger cars
• Easy installation
• Completely mechanical, no electrical or air connections
• Minimal maintenance required
• High flow design for rapid draining
• NSF 61/372 certified by a third party
• Shock & Vibration tested by a third party

Design Features

• Low lead brass/bronze
• Self-operating valve
• Dual port seals
• No power or air required when used without heater
• Inline serviceable

Product Description

Relying on manually opening valves for freeze protection allows for human error or plugging of partially cracked valves. This annually accounts for large amounts of freeze damage resulting in huge monetary loss including repairing damaged equipment, piping, as well as system downtime.

The self-actuating HAT/FP valve eliminates the human errors associated with manual valves. This automatic valve is ideal for the protection of piping, safety showers, solar collectors & piping, condensate systems, fire lines, spray nozzles, or as backup protection on traced systems.

Operation

The HAT/FP-35 will initiate flow when the thermostatic actuator senses 35°F (1.6°C) and will remain open as long as the discharge water temperature is below 40°F (4.4°C).
In standard flow, the actuator will sense ambient temperature to initiate flow and then respond to water temperature; in reverse flow, the actuator will sense water temperature.

Benefits

• Protects against freeze damage
• primary protection or fail safe backup
• Long service life
• Self-operating
• Fast response
• No outside power source required
• Discharges minimum amount of water required

Design Features

• Stainless steel body, fittings, spring, and plug
• Exclusive Thermoloid® thermal actuator
• Corrosion resistant
• Narrow temperature band
• Compact and low mass
• Two wrench flats for easy installation
• Ram-type plug for reliable shutoff

Product Description

Relying on having to manually open valves for freeze protection allows for human error or plugging of partially cracked valves. This annually accounts for large amounts of freeze damage resulting in huge monetary losses including repairing damaged equipment, piping, as well as system downtime.

The self-actuating IC/FP valve eliminates the human errors associated with manual valves. The automatic IC/FP valve is ideal for the protection of piping, safety showers, solar collectors & piping, condensate systems, fire lines, spray nozzles, or as backup protection on traced systems. Its sensitivity to water temperature makes this valve ideal for applications where water conservation or wastewater disposal are a prime concern.

Operation

The IC/FP is installed into the NPT threaded opening with adequate internal clearance. When the water temperature approaches freezing, and freeze damage is imminent, the thermal actuator modulates the valve open. When the makeup water temperature returns to the safe range, the valve then modulates closed, minimizing water loss. Due to the sensing element, the thermal actuator, always being wetted this valve is unaffected by ambient air temperature, and opens only when the water is in danger of freezing. Typically the valve opens below 35°F (1.7°C), and closes at 40°F (4.4°C).

Benefits

• Protects against freeze damage
• primary protection or fail-safe backup
• Long service life
• Self-operating
• Fast response
• No outside power source required
• Discharges minimum amount of water required

Design Features

• Brass or stainless steel body, fittings, and plugs
• Corrosion resistant
• Exclusive Thermoloid® thermal actuator
• Narrow temperature band
• Compact and low mass
• Two wrench flats for easy installation
• Ram-type plug for reliable shutoff