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Hydrant Valves

 

 

Service Manual

Right Angle Oblique Turn Down

 

Wheel Valve Double Control Stand Post

 

Service manual for SUKAN Landing / Hydrant Valve

Landing Valves are used for fighting fire with water and accordingly mounted in fire hydrant system at Internal or External places. The landing valves are sometimes also referred to as internal Hydrants because they are usually fitted inside the buildings for wet hydrant system. These are primarily intended for being installed at the staircase landing at each floor level, from where fire-hose could be laid out by the fire brigade or trained man for fighting fire on the concerned floor. Because of this, the design of these valves is compact, so as, not to cause any obstruction to the passage where these may be installed.

Specification:

SUKAN Landing Valves are basically defined and designed, as per IS 5290 Specification. SUKAN Landing Valves are normally available in one size of 75mm and are designed to deliver at least 900 LPM at 7 Kg/cm2 Inlet pressure and is defined in IS 5290 as type A. 100mm are also available as occasional cases to deliver 1800 LPM at 7 Kg/ cm2 having 2 outlet, which is defined, as IS 5290 type B.

SUKAN Landing Valves are having Inside & Outside diameter and thickness of Inlet Flanges as per IS 5290 only but drilling can be suit the site condition. The outlet is quick instantaneous female type.

Installation:

SUKAN Landing Valves are having flat face & hence it is recommended that matching flange should also be flat face. In case of raised face flange, take care while keeping gasket and tighten all the bolts i.e. tighten bolts evenly and uniformly.

Before installing the Landing valve, flush the pipeline with the continuous flow of water so that dust/dirt/stone & other foreign particles from the pipeline are removed. After successful installation also, flush the pipeline in full open valve condition so that all the remaining foreign particles are removed.

Operation:

Hand Wheel is provided for opening and closing of the valve. Please avoid use of spanner/ pipe wrench, etc. for opening and closing the Landing Valve. Incase of extra high backpressure it is required to reduce the inlet pressure to 7 Kg/cm2 max. while, the same can be achieved by using orifice plate before Landing Valve.

Sometime high backpressure is generated while opening or closing first or last Landing Valve respectively. Temporarily one can use F handle to overcome the situation. The reference F handle design is shown in Figure 1 below.

 

When the Hydrant Valve is in a close position keep the Male blank cap in adopter to avoid foreign particles to enter the body of the Landing Valve.

Testing & Maintenance:

The landing valves are to be inspected and tested at a regular interval for following.

1. Ease operation of Lug assembly: This can be done by pulling the Lug Assembly several times & visualize its smoothness.

2. Leakage through the seat in fully closed position: If leakage is visualized, open the hand wheel and allow water to pass for some time to remove dirt on seat if it is there. Then close the valve and observe. Is still the valve is leaking, open the seat, see Figure 2 below and if it is damaged, replace it.

3. Leakage through Male Blank Cap: check that Type A washer is properly in the groove of adapter and without dirt. If the leakage through air vent hole, repeat the procedure referred in 2 (above)

Each Landing Valve is to be flushed properly and after testing, Male blank cap has to be kept in position.

 

Recommended Spares:

We suggest following parts to be kept as spares.

1. Rubber seat

2. Rubber Washer Type A

3. O Ring for Bonnet

4. Hand Wheel

5. Nut for Hand Wheel



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