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Know-how makes the dierence
TYPE 3500
INSTALLATION, OPERATION
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AND MAINTENANCE
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TYPE 3500 INSTALLATION, OPERATION & MAINTENANCE MANUAL
1. WARNING
Users must strictly comply with the instructions and the use of proper function of angle seat valves. DVC A/S will not be responsible for problems due to inappropriate use
of angle seat valves.
2. ATTENTION
Do not touch the valve body as it becomes hot during operation, which can
cause serious human injury.
3. AREAS OF USE
All our angle seat valves are made of 100% stainless steel, and can withstand medias
such as water, salt water, steam, chemicals, oil, crude oil and are suitable for use in
the textile industry and similar areas.
4. STORAGE OF VALVES
On receipt, check that the valve is in fully assembled condition. End caps on the valve
should be kept intact and removed only at the time of installation. Performance depends on preventing damage to the seating surfaces.
Valves should be stored in a covered area. If a covered area is not available any water proof covering material should be spread over the valves and the valves should be
kept on a wooden pallet at least 6” above the ground level.
Do not apply tar, paint, grease or any other material inside the valve or on the stem,
as this could interfere with the performance of the valve.
5. INSTALLATION
Before installation, remove all foreign matter in the pipline by ushing the line with
water or compressed air.
End connections of the valve should be carefully checked and cleaned before
installation. Taper threaded end ttings should not be overtightened. Valves should be
checked for proper alignment of gasket before tightening the ange joint.
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TYPE 3500 INSTALLATION, OPERATION & MAINTENANCE MANUAL
6. USE OF THE ANGLE SEAT VALVE
1. Make sure the air is clean and dry.
2. Check the regulator for correct air pressure and correction (3-8 Bar).
3. Check the environmental temperature (-10°C to 80°C)
4. Check the uid temperature (PTFE:-20°C to 180°C)
5. Verify on/o positions in the valve.
7. WELD END VALVES
While welding the valves with the pipeline, ensure absolute cleanliness as dirt can
enter the body and damage the sealing of the stem guide and seats.
Dismantle the top of the valve before welding.
10. OPERATION
Before putting new valve into service, check the size, ends, material and pressure
temperature limitation of the valve with the operating parameters for capacity and
compatibility.
11. MAINTENANCE
Parts of the valves are generally maintenance free. The materials of the sliding parts
have been selected to keep wear to a minimum. However, for reasons of safety and to
reduce maintenance and repair costs, all valves, especially those which are operated
occasionally shuld be inspected at least two times a year.
12. DISMANTLING
If the valves do not seal tight, it indicates that the seat is damaged and the valve
must be dismantled.
Before removing the complete valve from the pipeline or prior to repair of the valve in
the pipeline itself, the entire valve must be depressurized and suciently cooled down
so that the temperature is below the evaporation temperature of the ow medium
(in stung box too) and scalding prevented.
The seating surfaces and gasket should then be examined. If damaged please change
the valve or seat.
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TYPE 3500 INSTALLATION, OPERATION & MAINTENANCE MANUAL
Warning:
Before any maintenance work is carried out the valve must be sealed o,
depressurized and cooled suciently.
The actuator must be disconnected from supply air.
NO. DESCRIPTION MATERIAL
1 TOP CAP PC / STAINLESS STEEL
2 O-RING NBR
3 INDICATOR ROD NYLON
4 SPRING 65MN
5 NUT ALUMINUM
6 CYLINDER CF8
7 PISTON ALUMINUM
8 PISTON SEAL FPM
9 O-RING NBR
10 WASHER AISI 304
11 BEARING COPPER
12 CYLINDER COVER AISI 304
13 O-RING NBR
14 SPRING LOCK RING AISI 304
15 CONNECTOR CF8M
16 BODY SEAL PTFE
17 VALVE ROD AISI 316
18 VALVE CORE CF8M
19 SEAT PTFE
20 HEX NUT AISI 316
21 SEAL FPM
22 WASHER AISI 304
23 SPRING AISI 304
24 WASHER AISI 304
25 VALVE ROD SEAL I PTFE + CARBON
26 VALVE ROD SEAL II PTFE
27 VALVE ROD SEAL III PTFE + CARBON
28 VALVE BODY CF8M
IOM-3500-GASKET-UK-05-2015-REV.B
we reserve the right for changes
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