Stafsjö BV, D2G, HL, HP, HX Original Installation And Service Instruction

Original

Installation and service instruction

Knife gate valves

2

Document: is-VALVE, 2017-07-01, issue: 14

Original

Installation and service instruction

Knife gate valves

Table of contents

A)

General .................................................................................................................................................................. 3

A1 Symbols ................................................................................................................................................................. 3

A2 Valve destination .................................................................................................................................................... 3

A3 Related documents ................................................................................................................................................ 3

A4 Valve marking ........................................................................................................................................................ 4

A5 Transport, storage and handling................................................................................................................................. 4

Storage and transport: ................................................................................................................................................. 4

Handling: ...................................................................................................................................................................... 4

B) Installation/functional check ............................................................................................................................... 5

B1 Safety warnings at installation ................................................................................................................................ 5

B2 Conditions for installation ....................................................................................................................................... 5

B3 Pressure, flow direction and valve position ............................................................................................................ 6

B4 Necessary support for special cases ...................................................................................................................... 6

B5 Steps to install ........................................................................................................................................................ 6

B6 Installation in an ATEX-classified area ............................................................................................................. 9

B7 Pressure testing after installation (if necessary) ..................................................................................................... 9

B8 Disassembling the valve ........................................................................................................................................ 9

C) Service and maintenance .................................................................................................................................. 10

C1 Safety warnings at service and maintenance ....................................................................................................... 10

C2 Manual and automatic actuation .......................................................................................................................... 11

C3 Maintenance......................................................................................................................................................... 11

C4 Troubleshooting ................................................................................................................................................... 11

Declaration in compliance with EU-Directives ............................................................................................................. 13

All specifications are subject to change without notice.

3

Document: is-VALVE, 2017-07-01, issue: 14

A) General

In this instruction a “knife gate valve” is shortly called “valve”.

A1 Symbols

In this instruction notes and warnings are marked with symbols:

XXXXX

Danger / Warning

Points out a dangerous situation which may cause personal injuries or death.

Advice

Has to be respected.

Information

Information useful to follow.

If these notes and warnings are not respected by the user, dangerous situations may occur and may invalidate the
warranty of the manufacturer.

A2 Valve destination

Valve types BV, D2G, HG, HL, HP, HX, JTV, MP, MV, RKO, RKS, SLF, SLV, SLH, SLX, TV, XV and WB are destined
– after installation between flange(s) in a pipe system – to shut off, to open or to control the flow within the admissible
pressure/temperature limits.

These pressure and temperature limits depend on the materials of valve body, gate and seat. Temperature limits are
defined in the valve data sheet of each type. Maximum working pressure are marked at the valve body and on the label
attached on the beam.

The flow shall be without vibrations and/or pressure chocks. The surrounding environment should not imply any risk to
the valve. This also implies to explosive environment – except for valves classified for ATEX- area

and marked

accordingly.

Installation of the knife gate valve is preferred with the actuator in an upward position – except for RKO, JTV and D2G.

At valve operation respect:

• The manufacturers declaration to EC directives,

• This original installation and service instruction which is supplied together with the valve.

Stafsjö Valves AB does not accept any responsibility if this “Valve destination” is not observed.

A3 Related documents

Further information on the valves is available on www.stafsjo.com.

ds+valve type (i.e. ds-BV) = Data sheet with technical information (di men sio ns, mat erial specification etc.)
mi+valve type (i.e. mi-BV) = Instructions for maintenance on each valve type.
sp+valve type (i.e. sp-BV)

= Specify spare parts for each valve type.

acc+type of accessory (i.e. acc-SV)

= Accessory for different types of valves. I.e solenoid valve.

stafsjo-valve-spec = Specification of parts and valve combinations.

4

Document: is-VALVE, 2017-07-01, issue: 14

A4 Valve marking

Each valve is labelled as follows:

Additional: Markings on casted valve body:

DN XXXX: (mm) nominal diameter
PN XX: (bar) pressure class of valve body
i.e. GGG50 valve body material

These labels shall not be removed, over coated or otherwise covered.

“Max. PS Valve body” which is marked on the label (see above) is max. allowed pressure when the valve
is open. Max. allowed pressure on closed valves may be lower and is marked on this label as well.
More information on this is available in the data sheet which can be downloaded from www.stafsjo.com.

Refer to the “Serial Number” of the valve marking at any contact with Stafsjö.

A5 Transport, storage and handling

Note

Additional requirements may be found in the actuator instruction, if any.

Storage and transport:

Keep the valve in open position during storage to ensure its function and to protect the polished surface of the gate.
Store the valve in a clean and dry environment and protect it against dirt, dust and other contamination. Do not expose
the valve to direct sunlight. If the valve is stored outside, it shall be wrapped tightly in a plastic foil or similar to protect it
against moisture or any dirt contamination. It should also be stored high enough without any risk to be covered in snow
or enclosed by water.

The valve has been packed according to the terms of delivery. It is important to make a visual inspection at
arrival. If transport damage is detected, report to the transportation company.

Handling:

Lifting and moving shall be carried out with soft straps. Place and fasten the
soft strap on the valve body as shown in fig.1. Make shure that all equipment is
designed to hold the weight of the valve.

Never place lifting equipment:

• On the actuator, accessories or gate guards.

• In the bore of the knife gate valve, since it cause damages

to the seat and retainer ring.

Label for identification of seat and gate material

Fig.1

Ser.No: Serial number consisting

of year – individual no - order
number.

CE-marking when applicable.

Max PS Valve
body/differential: 10/10 BAR

0045

5

Document: is-VALVE, 2017-07-01, issue: 14

Specifically note that threaded hole on top of pneumatic cylinder type EC, is only
for handling the cylinder itself. See figure 2.

B) Installation/functional check

This instruction includes safety recommendations for foreseeable risks at installation into a (pipe)
system. The user is responsible to complete this instruction with warning notes for system-specific
aspects. All requirements of the system shall be observed.

B1 Safety warnings at installation

• Installation shall be performed by qualified personal. Qualified are those persons who, due to
experience, can judge the risks and execute the work correctly and who are able to detect and
eliminate possible risks.

• After installation, the function of the valve shall be in accordance with the valve and the actuator (if
any) destinations, see section A2.

• At the end of the installation the gland bolting shall be tightened according to Table in section B7.

• A valve without an actuator should not be installed into the (pipe) system.

• Some valve types can be installed as end valves. Contact Stafsjö for specific requirements and

information.

Danger

1. A valve with an actuator sh a ll only be operated if:

• The valve is installed between flanges or between a flange and a protective device.

• The gate guards are installed on the beams on automatic operated valves.

2. If the knife gate valve is installed as an end valve in a pipe line, always install protective equipment

to prevent people getting to close to the valve and being exposed to the media transported in the
system when the valve opens.

People’s life and health is at stake if this is not observed. Any other action is the responsibility

of the user.

B2 Conditions for installation

Make sure:

• To install valves according “Valve destination”, see section A2. Observe valve marking, see section A4.

• That the pipe section is not exposed to vibrations or other mechanical stresses which could deform the valve body and

affect the valve’s tightness and/or abil ity to operate.

• That the valve environment does not imply any risk to the valve, the actuator or the accessories. This also implies to
explosive environment – except for valves classified for ATEX- area

and marked accordingly.

• That flanges, pipe line and the valve are empty, free from solid and sharp particles.

• That the valve is installed between flange(s) (fixed or loose) to ensure that the valve is securely fixed and that the

flange keeps tight.

• That the knife gate valve is protected against radiant heat, if the valve is placed near a heat source whose temperature
exceed maximum allowable temperature for the valve or its actuator.

• The mating (=gasket contact) surface of the flange cover the retainer ring completely. Detailed information on flange
drilling, threads, length and number of bolts is available in data sheet on www.stafsjo.com.

• To follow those instructions which are supplied with an actuator (if any).

• The pipe line is free from pressure.

• Additional requirements may be found in the actuator instruction – specifically to adjust the correct OPEN and

CLOSED positions before the valve is installed.

OK

Fig.2