Stafsjö HL Maintenance Instruction

Document: Maintenance instruction
Product: HL/HG/HP/HPT
Issue: 3
Issue date: 2010-10-05
Maintenance instruction
This maintenance instruction is a step-by-step instruction for service
and maintenance on Stafsjö's HG valve. Same procedure also applies
for HL, HP and HPT. The instruction shall be available for the persons
responsible for service and maintenance on the Stafsjö knife gate
valves.
The following procedures are described:
A – Change of seat
B – Change of box packing
C – Change of box packing when the valve is installed in a system
D – Torque for nuts on gland
E – Change of gate, guide strips and body gasket
F – Torque for valve body screw joint reinforcement
G – Change from hand wheel (HW) to pneumatic cylinder (AC)
For more detailed information on the technical data of the Stafsjö knife gate 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 the metal plate containing the valve article number and
serial number. When corresponding with Stafsjö Valves AB or your local representative, please
have these numbers available.
Stafsjö 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 ac-
cept any responsibility of the product if any significant change has been done to the product.
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 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 installed. The system must be free from pressure and empty. Actuator and acces-
sories must be disconnected before any work is commenced.
All gate guards must be installed after finished maintenance on the knife gate valve.
Stafsjö Valves AB. SE-618 95 Stavsjö, Sweden. Tel: +46 11 39 31 00. Fax: +46 11 39 30 67. info@stafsjo.se www.stafsjo.com
Information is only for purpose All specifications are subject to change without notice.
A Bröer Group Company