©Copyright Task Force Tips, Inc. 2016-2017
LIA-540 September 25, 2017 Rev03
4
3.0 GENERAL INFORMATION
The LDH Gated Wye is a lightweight, low friction-loss valve that can be used in many water distribution applications. Dual robust
valve mechanisms from the TFT Ball Intake Valve are streamlined to a large waterway for the ultimate in versatility. Valve seats are
fi eld replaceable, Devices include a 300PSI pressure gage and quarter turn air vent and drain valve. Two robust carrying handles
make for easy deployment. A polymer bearing ring prevents galvanic corrosion on LDH couplings.
3.1 PARTS IDENTIFICATION AND MODELS
CRANK
SIDE A
COUPLING
PRESSURE
GAUGE
PRESSURE
RELIEF VALVE
VALVE POSITION INDICATOR
CARRYING HANDLE
SIDE B
COUPLING
AIR VENT & DRAIN
SIDE B
COUPLING
3.2 SPECIFICATIONS
Dual LDH outlet waterway size (at valve seat): 3.65” (93mm)
Inlet waterway size: 5.5” for 6” Storz and 6” Threaded couplings, 4.5” for all other couplings.
LDH Valve meets NFPA 1965 slow close requirement.
Maximum Operating Pressure: 300 psi (20 bar)
Hydrostatic Proof Test Pressure: 900 psi (62 bar)
Temperature Rating*: -25°F to 135°F (-32°C to 57°C)
*For temperatures below 32°F (0°C), valves must be drained after use to avoid damage. See section
2.0 SAFTEY
.
3.3 CORROSION
Hose couplings are attached using polymer bearing rings which provide electrical insulation to help galvanic corrosion. The parts are
then hard anodized, and fi nally powder coated, inside and out, to help prevent corrosion. The eff ects of corrosion can be minimized
by good maintenance practice. See section
6.0 MAINTENANCE
.
CAUTION
Dissimilar metals coupled together can cause galvanic corrosion that can result in the inability
to unscrew the threads or complete loss of thread engagement over time. Per NFPA 1962
(1998 edition), if dissimilar metals are left coupled together, an anti-corrosive lubricant should
be applied to the threads. Also the couplings should be disconnected and inspected at least
quarterly.
3.4 USE WITH SALT WATER
Use with salt water is permissible provided valve is thoroughly cleaned with fresh water after each use. The service life of the valve
may be shortened due to the eff ects of corrosion and is not covered under warranty.
