Emerson Kunkle Series Quick guide

KUNKLE PRESSURE RELIEF VALVES

Operating and Safety inStructiOnS

PRE-INSTALLATION 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 dirt from

getting inside. It should be installed correctly.

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. service life

may vary upon condition of service. Check unit

at least once per 8000 hours or longer intervals

based upon site experience.

Before installation these instructions must be fully read and understood

INSTALLATION

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. 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 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.

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

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.

installing the valve in threaded connections.

Use the wrench flats provided to tighten

the valve to the connecting pipe, and do

not overtighten. To do so may cause valve

leakage.

4. For flanged valves, use new gaskets and

tighten the mounting studs evenly.

VCOSI-01867-EN 17/01

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 o the local jurisdictional

requirements where the valve is installed,

repairs may have to be made by a repair facility

holding a VR stamp.

CONTACTS

Kunkle

An Anderson, Greenwood Company

Phone: 828-669-5515

1281 Old US 70, Black Mountain, NC 28711

Fax: 828-669-0586

WARNING

Removal of the seal wire or any attempt to adjust,

repair, or modify this product by non-qualified

or non-authorized persons voids the product

guarantee and may cause serious damage to

equipment, personal injury, and death. Kunkle

Valve is not liable for any damages resulting from

misuse or misapplication of its products.

KUNKLE PRESSURE RELIEF VALVES

Operating and Safety inStructiOnS

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