Emerson Kunkle Valve Series User manual

KUNKLE VALVE PRESSURE RELIEF VALVES

INSTALLATION AND OPERATING INSTRUCTIONS

INSTALLATION

Always wear proper safety equipment,

includingsafety glasses and ear protection.

1. Mount the valve in a vertical position so

that the valve body is self-draining. If a

body drain port is provided, make sure it

is open when required by the ASME code.

HANDLING

This pressure relief valve is designed to protect

equipment from overpressure. The valve

should be handled with care, not subjected to

heavy shock loads and protected to prevent

contamination from getting inside. It should

be installed correctly per ASME boiler and

pressure vessel code requirements, where

applicable. Failure to do so could result in

property damage or serious injury to personnel.

When hoisting the valve into position for

installation, care should be exercised so that

lifting straps do not contact the valve lift lever.

Rev. E 05/24/2007

3. For threaded valves, to prevent sealing

compound from entering and damaging the

valve, apply a small amount of pipe thread

sealing compound to external threads only.

Do not put any sealing compound on the

first thread or on any internal threads. To

do so may cause the sealing compound to

enter the valve and cause seat leakage.

Do not use the valve body or bonnet for

installing the valve in threaded connections.

Use the wrench flats provided to tighten

the valve to the connecting pipe. Torque the

valve enough to ensure a pressure-tight

seal and do not overtighten. To do so may

causevalveleakage.

4. For flanged valves, use new gaskets and

tighten the mounting studs evenly.

5. Do not paint, lubricate or allow

contaminates to enter or cover the interior

or any working parts of the valve.

6. Remove gag screw (if valve is so equipped)

before system start up.

Do not plug any bonnet vent openings. The

inlet piping should be as short as possible,

with no elbows and equal to or greater

than the size of the pressure relief valve

inlet connection. This will help to limit the

inlet pressure drop to 3% or less when the

valveis relieving.

2. When discharge piping is connected to the

valve outlet, make sure it is self-draining if a

body drain port is not used. The valve should

not be connected to any discharge pipe that

contains pressure before the valve opens or

to any pipe where the pressure build-up is

greater than 10% of the set pressure when

the valve is open and relieving.

Discharge piping, other than a short tailpipe,

must be supported. For steam service,

a drip pan elbow or flexible connection

between the valve and the pipe should be

used to prevent excessive pipe stress, due

tothermal expansion, from being imposed

on the valve body.

PRE-INSTALLATION

Verification of model and service media/capacity/

temperature/pressure limits

Verify the model number on the tag against

the model number of the order. For European

service, verify the 'CE Mark' tag is connected

to the valve. Verify the service media, capacity,

temperature and pressure limits of the valve

against the application. Please note the marked

capacity is based on standard temperature

and pressure conditions and is valid only for

the service media noted on the catalog order

guide. Adjustments to the capacity must be

performed for different temperatures or service

media and are the responsibility of the end user

todetermine.

Before installation these instructions must be read fully and understood

WARNING

Removal of the seal wires or any attempt to

adjust, repair or modify this product by non-VR

Certified personnel voids the product guarantee

and may cause serious damage to equipment,

personal injury and death. Kunkle Valve is not

liable for any damage resulting from misuse or

misapplication of its products.

MAINTENANCE

Maintenance should be performed on a

regular basis. An initial inspection interval

of 12 months is recommended. Depending

on the service conditions and the condition

of the valve, the inspection interval may be

decreased or increased. Use only Kunkle parts

for repair. Depending on the local jurisdictional

requirements where the valve is installed,

repairs may have to be made by a repair

facilityholding a VR stamp.

KUNKLE VALVE PRESSURE RELIEF VALVES

INSTALLATION AND OPERATING INSTRUCTIONS

OPERATION

1. Maintain a system operating pressure at

least 5 psig or 10% below the set pressure

of the valve, whichever is greater. Operating

too close to the valve set pressure will

cause seat leakage and will shorten the

time between valve maintenance.

2. Do not use the safety valve as a control

valveto regulate system operating pressure.

Excessive operation will cause the seat to

leak and will require more frequent valve

maintenance.

3. ASME Section I and VIII valves equipped with

lift levers are designed to be operated only

when the system pressure is 75% of set

pressure or greater. ASME Section IV valves

may be operated at any set pressure. When

hand operating the valve, hold it open long

enough to purge any foreign matter from

the seat area. If a cable or wire is attached

to the lift lever for remote actuation, make

sure the direction of pull is the same as it

would be if the lever were pulled directly

byhand.

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