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Stafsjö XV Maintenance Instructions Manual

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Document: Maintenance instruction
Product: XV
Issue: 2
Issue date: 2010-10-05
Maintenance instruction
This maintenance instruction is a step-by-step instruction for service
and maintenance on Stafsjö's knife gate valve XV. The instruction
shall be available for persons responsible for service and maintenance
on Stafsjö's knife gate valves. The following procedures are described
in the service instruction:
A – Change of seat
B – Change of gate and box packing
C – Change of box packing when the valve is installed in a system
D – Torque for nuts on gland
E – Change from hand wheel (HW) to pneumatic cylinder (AC)
For more detailed information on technical data of valves, actuators or accessories, please see
data sheets on www.stafsjo.com, or contact Stafsjö Valves AB or your local representative.
Each knife gate valve is identified with a label containing the article number and serial number.
When corresponding with Stafsjö Valves AB or your local representative, please have these
numbers available.
Stafsjö Valves AB does not accept any responsibility for the product if service and maintenance
on the knife gate valve is not performed according to this instruction. Nor does Stafsjö Valves
AB accept any responsibility of the product if any significant change has been done to the prod-
uct.
Spare parts
Recommended spare parts are described in spare part data sheets for each knife gate valve
type on www.stafsjo.com. Stafsjö recommends the customer to keep one set of spare parts for
each valve type and size in store.
Spare parts can be ordered from Stafsjö Valves AB or your local representative. Spare part data
sheets and addresses are available on www.stafsjo.com.

Safety information

No work is allowed on the knife gate valve when the system is pressurised or the actua-
tor is connected. The system must be free from pressure and empty. Actuator and ac-
cessories must be disconnected before any work is commenced.
All gate guards must be installed after finished maintenance on the knife gate valve.
Information is only for informational purpose. All specifications are subject to change without notice.

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Summary of Contents for Stafsjö XV

  • Page 1: Safety Information

    Maintenance instruction This maintenance instruction is a step-by-step instruction for service and maintenance on Stafsjö’s knife gate valve XV. The instruction shall be available for persons responsible for service and maintenance on Stafsjö’s knife gate valves. The following procedures are described in the service instruction: A –...
  • Page 2 Document: Maintenance instruction Product: XV Issue: 2 Issue date: 2010-10-05 Main components in the Stafsjö knife gate valve XV Gate Stud bolt Nut and washer Gland O-ring Box packing Retainer ring Seat Valve body Figure 1...
  • Page 3 Document: Maintenance instruction Product: XV Issue: 2 Issue date: 2010-10-05 Part list of the Stafsjö knife gate valve XV Figure 2 Part Part Part Part Hand wheel Washer Screw Cylinder Yoke Washer O-ring Bearing Gate Clevis pin Slide washer Beam...
  • Page 4 Issue date: 2010-10-05 Service and maintenance See figure 1-3 for identification of parts on the XV valve. Parts may differ depending on the valve size and manufacturing date. Please contact Stafsjö Valves AB or your local representa- tive if you have any questions.
  • Page 5 Stafsjö recommends changing the gate if it is damaged to ensure the function of the valve. 8. Check that the guide strips (14, on XV valves DN 500-DN 800) in the valve body are not worn out and that they are in correct position.
  • Page 6 Document: Maintenance instruction Product: XV Issue: 2 Issue date: 2010-10-05 box. The joint of the second and third braid must be placed on the opposite long side of the joint of the previous braid, not on top of each other.
  • Page 7 Document: Maintenance instruction Product: XV Issue: 2 Issue date: 2010-10-05 7. Start the installation of the first braid (9) on one of the long sides of the gate (6). Use a blunt tool in plastic or wood and a hammer to push the braid into the box. Make sure that the braid ends meets properly.
  • Page 8 Document: Maintenance instruction Product: XV Issue: 2 Issue date: 2010-10-05 1. Close the valve completely. 2. Demount the hand wheel manoeuvre. See B: 2. 3. Screw the locking nut (28) and the gate clevis (17) halfway on to the cylinder piston rod (25).

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