Valmet Flowrox SKW DN50-600, Installation Maintenance And Operating Instructions

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4SK70EN - 5/2023
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2.7 Technical Specifications
Pressure range: 0-10 bar (0 -150 psi)
Max pressure differential: according to pressure rating.
Temperature range: See section 2.2.
Flow direction: Bidirectional
2.8 Product identification
Flowrox valve name plates or identification plates are shown
on Figure 5.
Figure 5. Valve type plate example.
1. Type designation
2. Size
3. Body material
4. Maximum shut-off pressure differential
5. Max. temperature
6. Min. temperature
7. Gate material
8. Flange drilling
9. Pressure rating
10. Seat material
11. Serial number
2.9 Actuators
Standard actuators:
• Handwheel / handwheel with gearbox
• Pneumatic
• Hydraulic
• Electric
Manual actuator operation revolutions are shown in Table 5.
Valves are closed by turning clockwise. Do not use additional
levers or long wrenches for valve operation.
1
2
3
4
5
6
7
8
9
10
11
1
2
3
4
5
6
7
8
9
10
11
DN50-80
DN ≥ 100
Pneumatic actuators are with a fixed stroke and do not
require external controls to position the gate. The nominal
supply pressure for pneumatically operated valves is 6 bar (90
psi).
The air must be clean, dry, lubricated and properly filtered.
An air quality of minimum requirement to ISO 8573-1:2010
[7:4:4] is recommended. If any component used on the valve
has a stricter requirement (pressure, air quality), the stringent
shall prevail.
Use correct sized pneumatic hoses to ensure sufficient air
flow. Pneumatic actuator noise level may exceed 85 dB and it
is recommended to use ear protectors when working near the
valve.
Hydraulic actuators have a nominal supply pressure of 150
bar (2250 psi).
Electric actuators have open/close limit switches preset
at the factory. A separate instruction from the actuator
manufacturer is always included in the shipment.
Make sure that the 3-phase electrical connection is done
correctly. If the connection is done wrong, the limit or torque
switches will not trigger as designed. This will allow the
actuator to move beyond limits and cause damage to the
valve.
Consult the manufacturer’s instructions on actuator
requirements or/and limitations. If actuator is changed or
valve needs adjustment, follow the Maintenance instructions.
The gate speed may not exceed 25mm/s.
Table 5. Manually actuated valve operating revolutions.
Valve nominal size
DN
50
(2")
DN
80
(3")
DN
100
(4")
DN
150
(6")
DN
200
(8")
DN
250
(10")
Handwheel revs.
to stroke valve
18 25 28 40 50 60
Bevel gear revs. to
stroke valve
- - - - - -
Valve nominal size
DN
300
(12")
DN
350
(14")
DN
400
(16")
DN
450
(18")
DN
500
(20")
DN
600
(24")
Handwheel revs.
to stroke valve
- - - - - -