Valmet Flowrox SKW DN50-600, Инструкция по установке, обслуживанию и эксплуатации

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4SK70EN - 5/2023
16
Table 7. Maintenance schedule.
Maintenance task Frequency & advice
Do a leakage
inspection
Regularly. Refer to Troubleshooting.
Lubricate valve After every 50 cycles. More often if valve is
operated rarely. Refer to chapter 6.1.3.
Lubricate the actuator
stem
Every six months. Read the manufacturer’s
instructions.
Run an open/close
cycle
Suggested once a month for smooth and
reliable operation.
Examine the flushing
and drainage
Every two months
Clean the gate Every two months. Reduces the ring sleeve
and gland packing wear.
Examine the gate for
erosion
Every two months.
Examine the valve for
erosion and wear
Every six months.
6.3 Spare parts
To ensure correct and quick delivery of spare parts, the order
must contain at least the following information:
• Serial number
• Valve type code
• Spare part name and quantity (example: Ring sleeve, 2
pieces)
You can order the spare parts from Valmet Flow Control,
distributors or agents. Contact information is available at
www.valmet.com/flowcontrol.
It is recommended to keep the spare parts of Spare part list.8
available at your factory warehouse. Part numbers refer to
Mechanical structure .
Table 8. Spare part list.
Part Part number Quantity/valve
Ring sleeve (set) 4 1
Secondary seal 7 1
Sealing kit for
hydraulic or
pneumatic actuator
- 1
Lubrication
Use only silicone based lubricants such as DOW#
111, DOW 4, DOW 44, GENERAL ELECTRIC
COMPOUND G661, AND RHONE - POULENE
RHODORSIL III.
Flowrox gate valves have grease nipples on both sides of the
valve body (Figure 12). Valves are lubricated when assembled
- therefore first lubrication should not be required unless the
valves have been in stock for a longer time. For dry material
handling, lubrication might be limited or forbidden.
Hydrocarbon based greases cannot be used to lubricate these
valves as the elastomer ring sleeves will swell and disintegrate.
Lubricate both sides of the valve approximately every 50
cycles, or after long periods of infrequent cycling. Grease
volume requirement is shown in Table 10. Please notice that
even when the lubricant is inert it may disturb a sensitive
process. Acceptable lubricants include: DOW# 111, DOW 4,
DOW 44, GENERAL ELECTRIC COMPOUND G661 AND
RHONE - POULENE RHODORSIL III.
Figure 12. Grease nipples on valve body.
1. Valve body
2. Gate
3. Tower
5. Tower mounting bolt
6. Tower mounting washer
7. Secondary seal
8. Grease nipple
Table 9. Volume of grease required per unit.
Valve nominal
size
DN
50 (2") DN
80 (3") DN
100 (4") DN
150 (6") DN
200 (8") DN
250 (10")
Lubricant per
valve (cm3)
35 (1.18
fl. oz.)
40 (1.35
fl. oz.)
60 (2.02
fl. oz.)
65 (2.19
fl. oz.)
105 (3.55
fl. oz.)
240 (8.11
fl. oz.)
Valve nominal
size
DN
300 (12 ")
DN
350
(14") DN
400
(16")
DN
450 (18") DN
500 (20") DN
600 (24")
Lubricant per
valve (cm3)
480
(16.23 fl.
oz. )
490
(16.56 fl.
oz.)
550
(18.59 fl.
oz.)
620
(20.96 fl.
oz.)
1090
(36.85 fl.
oz.)
1470
(49.70 fl.
oz.)