Honeywell D05T Compact Design Pressure Regulating Valves Installation Guide
- June 6, 2024
- Honeywell
Table of Contents
Honeywell D05T Compact Design Pressure Regulating Valves Installation Guide
APPLICATION
The Honeywell Brackman D05T Pressure Regulating Valve is a high quality pressure regulating valve that maintains a constant outlet pressure over a wide range of inlet supply pressures. It is ideally suited for new residential and light commercial construction, drip irrigation, and applications requiring highly sensitive and accurate regulation.
The wide inlet pressure range of the D05T gives flexibility without compromising reduced outlet pressure accuracy or capacity. The superior balanced single seat design maintains a constant outlet pressure over a wide range of inlet pressures. The non-corroding unitized cartridge insert contains all the working parts and is easily replaceable.
The D05T is used for water or air regulation. It is not suitable for steam.
SPECIFICATIONS
Model: D05T Pressure Regulating Valves
Construction Materials:
Body: Bronze. Internal Parts: Stainless steel and engineered plastic.
Regulator Mechanism: Fabric-reinforced diaphragm.
Inlet Pressure: 400 psi maximum.
Reduced Pressure Range: 15 to 90 psi.
Outlet Pressure: Factory set at 60 psi.
Differential: 14 psi minimum (inlet to outlet).
Fluid Temperature (Maximum):
Air: 158°F (70°C). Water: 180°F (82°C).
Ambient Temperature: 33°F to 140°F (1°C to 60°C)
Pipe Sizes: 3/4 in. and 1 in. available.
Connections: Can be configured as female thread-by thread, single- or double-union, NPT threaded or sweat.
Strainer Screen Size: 0.032 in. (0.8 mm)
Gauge Tap: 1/4 in. NPT (available on all models).
Approvals: ASSE (Std. 1003) Certified. IAPMO, CSA, and City of L.A. Listed.
Dimensions: See Fig. 1.
Water Capacities (See Table 1): The suitability of a given regulator size
is dependent on
the pressure requirements of each installation. To determine the pressure
regulator valve size required for a specific installation, determine the
following:
- Pressure differential between inlet and outlet pressure in pounds per square inch (psi),
- Capacity in gallons per minute (gpm), and
- Allowable reduced pressure falloff in psi.
Given these variables, use Table 1 to determine the proper size pressure
regulator valve for your application.
Example: An installation has 135 psi inlet pressure, 60 psi outlet pressure
(75 psi pressure differential). If 12 gpm capacity is required with only 10
psi falloff allowable, a 1/2 in. D05T is required.
D05T COMPACT DESIGN PRESSURE REGULATING VALVES
Table 1. Water Capacities.
a Velocity in feet per second is based on schedule 40 pipe size. recommended pressure falloff for general use is approximately 15 psi (104 kPa). Recommended velocities for the flow of water: Residential and general use, 5 to 10 feet per second; industrial use, 7 to 15 feet per second; boiler feed, 7 to 15 feet per second.
INSTALLATION
When Installing this Product…
- Read these instructions carefully. Failure to follow them could damage the product or cause a hazardous condition.
- Check the ratings given in these instructions and on the product to make sure the product is suitable for your application.
- Installer must be a trained, experienced service technician.
- After installation is complete, check out the product operation as provided in these instructions.
Procedure
-
Flush the system clear of sediment or debris.
-
Close the supply valve and downstream isolating valve (if used).
-
Install the D05T with the arrow on the body pointing in the direction of water flow. (The D05T can be mounted in any position.)
The D05T can be installed directly onto the pipe by using the female NPT threads on each end. If space limitations restrict turning the D05T, install single- or double-unions.
NOTE: Heat from soldering can damage internal parts of the D05T. Always remove the tailpiece(s) from the D05T during soldering, or disassemble the D05T prior to heating the casting. -
Open the supply valve.
Changing the Outlet Pressure (See Fig. 1)
The D05T is factory set to 60 psi. To change the outlet pressure, turn the adjusting bolt counter clockwise to reduce pressure or clockwise to increase pressure.
To adjust the outlet pressure to a desired setting:
- Close the supply shutoff valve and open a downstream faucet to relieve static pressure in the line.
- Loosen the locknut by turning counter clockwise two turns.
- Turn the adjusting bolt counter clockwise several turns to make sure the setting is below the desired setting.
- Close all downstream valves and/or faucets and slowly open the supply valve until fully open.
- Turn the adjusting bolt clockwise to gradually increase the pressure until the gauge indicates the desired outlet pressure (under no flow condition).
- Reopen a downstream valve. During flow, there will normally be a pressure falloff of 3 to 15 psi depending upon the amount of water flow.
- Tighten the locknut by turning clockwise until tight. Do not overtighten.
Replacing the Cartridge (See Fig. 2)
The working parts of the D05T, including diaphragm, valve seat, strainer, and
disk are all contained in a replaceable cartridge. To replace the cartridge:
-
Shut off the supply valve and open a downstream faucet to relieve the system pressure.
CAUTION
To prevent injury and/or equipment damage, loosen locknut and turn adjusting screw counter clockwise to remove spring tension. -
Loosen locknut and turn adjusting screw counter-clockwise to remove spring tension.
-
Remove the bonnet and washer using an adjust- able wrench, socket, or box-end wrench.
-
Remove the cartridge using two screwdrivers as levers.
-
Attach new O-rings and screen onto the new cartridge. Make sure O-rings are properly installed above and below the screen.
-
Insert the new cartridge. Do not scratch the sides.
-
Place the washer on top of the cartridge.
NOTE: The inner lip must be pointing up to avoid damaging the diaphragm. -
Replace the spring, spring cup, and bonnet.
-
Readjust the outlet pressure to the desired setting by using the procedure described in Changing the Outlet Pressure section.
 
Fig. 3. D05T exploded view.
Cleaning the Cartridge Screen
To clean the cartridge screen:
-
Shut off the supply valve and open a downstream faucet to relieve the system pressure.
CAUTION
To prevent injury and/or equipment damage, loosen locknut and turn adjusting screw counter clockwise to remove spring tension. -
Loosen locknut and turn adjusting screw counter-clockwise to remove spring tension.
-
Remove the bonnet and washer using an adjust-able wrench, socket, or box-end wrench.
-
Remove the cartridge using two screwdrivers as levers as shown in Fig. 3.
-
Remove and clean the cartridge screen.
-
Replace the cartridge screen and make sure the O-rings are installed properly.
-
Carefully clean the cartridge seat area.
-
Insert the cartridge. Do not scratch the sides.
-
Place the washer on top of the cartridge.
NOTE: The inner lip must be pointing up to avoid damaging the diaphragm. -
Replace the spring, spring cup and bonnet (see Fig. 3).
-
Readjust the outlet pressure to the desired setting by using the procedure described in Changing the Outlet Pressure section.
OPERATION
The Honeywell Brackman D05T is a balanced, direct acting pressure regulating valve. The D05T provides constant downstream pressure regardless of varying inlet pressures and downstream flow demands.
The spring force holds the valve in the open position until downstream pressure, sensed by a port, is sufficient to press on the underside of the diaphragm and close the valve. As downstream pressure drops due to demand, the force on the diaphragm is reduced and the valve opens. Adjustment is made by manually turning the adjustment screw clockwise to increase the spring force and require a higher downstream pressure to close the valve. Similarly, reducing the spring force lowers the outlet set pressure.
Once the outlet pressure is set, the D05T regulates to maintain that pressure downstream. See Fig. 4 for the internal construction of the D05T.
TROUBLESHOOTING
Table 2 provides a troubleshooting guide for the D05T Pressure Regulating
Valves.
Table 2. Troubleshooting D05T Pressure Regulating Valves.
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1985 Douglas Drive North
Golden Valley, MN 55422
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