©Copyright Task Force Tips, Inc. 2010-2013
LIA-500 June 13, 2013 Rev04
4
3.0 GENERAL INFORMATION
The products in the LDH Suite are lightweight, low friction-loss valves and manifolds that can be used in many water distribution
applications. The robust valve mechanism from the TFT Ball Intake Valve is combined with TFT’s 2.5” quarter-turn ball valves and
folding handles for the ultimate in versatility. Valve seats are fi eld replaceable, and quarter-turn folding valve handles require low
force to move, even under pressure. Automatic valve lock on 2.5” valves maintains valve position while fl owing at partial openings.
Folding handles minimize required storage space. Devices include pipe threaded port for pressure gages. All models include a
carrying handle or strap. A polymer bearing ring prevents galvanic corrosion on LDH couplings.
3.1 PARTS IDENTIFICATION AND MODELS
THREE-WAY VALVED MANIFOLD
FOUR-WAY VALVED MANIFOLD
IN-LINE VALVE
AIR VENT/
DRAIN
VALVE POSITION
INDICATOR
CRANK
PRESSURE
RELIEF VALVE
HANDWHEEL
SIDE B
CARRYING HANDLE
SIDE A
(SEAL SIDE)
VALVE POSITION
INDICATOR
IN-LINE VALVE
SIDE B
FOLDING
HANDLES
SIDE A
(SEAL SIDE)
PRESSURE
RELIEF
VALVE
OPEN
CLOSED
OPEN
CLOSED
LDH WATER THIEF
3.2 SPECIFICATIONS
Main LDH Waterway size (at valve seat): 3.65” (93mm)
2.5” Valve waterway size: 2.5” (63.5mm)
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 SAFETY
.
3.3 CORROSION
Most hose couplings are attached using polymer bearing rings which provide electrical insulation to help galvanic corrosion. The
parts are hard anodized, and powder coated inside and out to help prevent corrosion. The effects of corrosion can be minimized by
good maintenance practice.
See section
3.5 MAINTENANCE
.
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 effects of corrosion and is not covered under warranty.