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SKW / SKF-2015-09-ENG
Original document language: English
Installation, operation and maintenance
instructions for Flowrox Slurry Knife Gate
valves SKW DN50 –600 (Wafer) and
SKF DN80 –600 (Flanged)
These instructions must be read carefully and
understood prior to the installation, use, and servicing
of this product.
N O T E
FLOWROX OY
P.O. Box 338
FI-53101 Lappeenranta, Finland
Tel. +358 (0)201 113 311 Fax +358 (0)201 113 300
E-mail: sales@flowrox.com
www.flowrox.com
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Table of Contents
Related Manuals for FLOWROX SKW Series
Summary of Contents for FLOWROX SKW Series
- Page 1 SKW / SKF-2015-09-ENG Original document language: English Installation, operation and maintenance instructions for Flowrox Slurry Knife Gate valves SKW DN50 –600 (Wafer) and SKF DN80 –600 (Flanged) These instructions must be read carefully and understood prior to the installation, use, and servicing of this product.
- Page 2 PRESENTED IN THIS MANUAL MAY BE OMITTED IN EVENT WHEN IT IS REQUIRED OR ALLOWED BY FLOWROX HAS TAKEN EVERY CARE IN THE PREPARATION OF THE CONTENT OF THIS MANUAL, BUT DOES NOT MAKE ANY REPRESENTATIONS, WARRANTIES OR GUARANTEES OR, EXPRESS OR IMPLIED, AS TO THE ACCURACY OR COMPLETENESS OF THIS MANUAL.
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Page 3: Table Of Contents
TABLE OF CONTENTS DIRECTIVE CONFORMANCE DECLARATIONS ..........4 General safety instructions ................ 5 INTRODUCTION ................6 Applications and purpose of use ..............6 2.1.1 Restrictions on use for SKW and SKF valves ..........6 2.1.2 Using the valve in explosive conditions ............6 General description ................. -
Page 4: Directive Conformance Declarations
Conformance declarations for accessories (solenoid valve, limit switches etc.) and actuators are supplied separately in component documentation. Risk analysis responsible employee at Flowrox Oy is Jarmo Partanen. On behalf of Flowrox Oy In Lappeenranta, 1 September 2015... -
Page 5: General Safety Instructions
(goggles, helmet, clothing and gloves). Always follow the factory safety regulations. In case of any discrepancies between translations, the English version shall prevail. © 2015 Flowrox Oy. All rights reserved. Contents are subject to change without notice. SKW/ SKF-2015-09-ENG... -
Page 6: Introduction
2 INTRODUCTION 2.1 Applications and purpose of use Flowrox Slurry Knife Gate valves (SKW) and (SKF) are intended for industry medium and slurry applications. They are bi-directional and are installed between flat flanges to shut-off or open flow within instructed temperature and pressure limits. -
Page 7: General Description
2.2 General description 2.2.1 Principle of operation Flowrox SKW and SKF valves are built with a cast or welded body and feature a heavy-duty stainless steel gate as a standard structure. Removable ring sleeves on both sides of the gate provide a bi-directional bubble tight seal. -
Page 8: Mechanical Structure
Manual actuator type depends on the valve size. Figure 2. Alternative actuators Type Description Manual actuator Manual actuator with gearbox Pneumatic actuator Hydraulic actuator Electric actuator © 2015 Flowrox Oy. All rights reserved. Contents are subject to change without notice. SKW/ SKF-2015-09-ENG... - Page 9 Tower mounting bolt Clevis Tower mounting washer Clevis locking screw Secondary seal (recommended spare part) Clevis pin Grease nipple Retaining ring Protective plug PTFE sealing strip © 2015 Flowrox Oy. All rights reserved. Contents are subject to change without notice. SKW/ SKF-2015-09-ENG...
- Page 10 Tower mounting bolt Clevis Tower mounting washer Clevis locking screw Secondary seal (recommended spare part) Clevis pin Grease nipple Retaining ring Protective plug PTFE sealing strip © 2015 Flowrox Oy. All rights reserved. Contents are subject to change without notice. SKW/ SKF-2015-09-ENG...
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Page 11: Technical Data
2.3 Technical data 2.3.1 Product identification Flowrox valve type plate is shown in Figure 5. 1. Valve type (see Table 5) 2. Serial number (year, order number, series size, individual valve number) 3. Customer tag number etc. 4. Nominal diameter, pressure class Figure 5.Valve type plate example. -
Page 12: Actuators
WAR N I NG Table 6.Manually actuated valve operating revolutions. Valve nominal size Handwheel revs. to stroke valve Bevel gear revs. to stroke valve © 2015 Flowrox Oy. All rights reserved. Contents are subject to change without notice. SKW/ SKF-2015-09-ENG... -
Page 13: Transportation, Storage And Lifting
When storing used valves, wash the valve and also the body cavities with fresh water and follow the steps above. For storage periods greater than 36 months, please contact Flowrox as the rubber parts need to be changed before use. -
Page 14: Installation
Flowrox gate valves have connections with DIN or ANSI bolt drillings as standard design, but other drillings are also available, such as BS, AS, JIS. Reserve enough space for safe installation and maintenance. See Appendix A for valve dimensions. -
Page 15: Flow Direction, Support, And Valve Position
See the following Figure 7. Recommended installation positions Forbidden installation positions Figure 7. Installation alternatives for SKW and SKF valves. © 2015 Flowrox Oy. All rights reserved. Contents are subject to change without notice. SKW/ SKF-2015-09-ENG... -
Page 16: Valve Installation
9. Run a few open/close cycles without pressure in the pipeline. Refer to Troubleshooting if the valve does not operate smoothly or without extra force. © 2015 Flowrox Oy. All rights reserved. Contents are subject to change without notice. SKW/ SKF-2015-09-ENG... -
Page 17: Flushing Installation Guidelines
WAR N I NG When valve flushing is required, customers need to provide the plumbing. The valves are shipped with plugs installed in the flushing holes. Contact Flowrox office for process specific instructions. The concept of flushing is to ensure the valve does not jam due to accumulation of medium solids in the valve body. - Page 18 If the medium is harmful in any way, the flushing port must be piped to a safe location. 9. Protective plug 12. Bottom cover plate Figure 10. Flushing example 1. © 2015 Flowrox Oy. All rights reserved. Contents are subject to change without notice. SKW/ SKF-2015-09-ENG...
- Page 19 12. Bottom cover plate A. Flush water supply B. Shut-off valve C. Drain line Figure 11. Flushing example 2. © 2015 Flowrox Oy. All rights reserved. Contents are subject to change without notice. SKW/ SKF-2015-09-ENG...
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Page 20: Valve Operation
10 seconds after the cycle. To improve flushing, the water should be left on until clean flushing water is exhausting through the drain line. © 2015 Flowrox Oy. All rights reserved. Contents are subject to change without notice. SKW/ SKF-2015-09-ENG... -
Page 21: Servicing And Maintenance
Check the condition of the valve regularly. When the valve is tight and it actuates flawlessly, lubricating is the only mandatory maintenance task. Periodic inspections should be done as valves may wear over time depending on conditions and process. © 2015 Flowrox Oy. All rights reserved. Contents are subject to change without notice. SKW/ SKF-2015-09-ENG... -
Page 22: Scheduled Maintenance
Spare part name and quantity (example: Ring sleeve, 2 pieces) ● You can order the spare parts from Flowrox offices, distributors or agents. Contact information is available at http://www.flowrox.com It is recommended to keep the spare parts of Table 9 available at your factory warehouse. -
Page 23: Lubrication
WAR N I NG 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. -
Page 24: Changing The Secondary Seal
10. Lubricate valve grease nipples (8) as instructed in Lubrication. 11. Reconnect automatic actuator to power supply and remove locking pins (13). 12. Run a few test strokes before the pipeline is pressurized. © 2015 Flowrox Oy. All rights reserved. Contents are subject to change without notice. SKW/ SKF-2015-09-ENG... -
Page 25: Changing The Ring Sleeves
10. Leave the valve to OPEN position until it is installed and follow the storage instructions if the valve is placed in stock. © 2015 Flowrox Oy. All rights reserved. Contents are subject to change without notice. SKW/ SKF-2015-09-ENG... -
Page 26: Valve Dismantling
8. Remove the bolts from between the actuator and tower (or adapter plate if equipped). Lift the actuator off the tower. 9. Refer to actuator manufactures’ instructions for actuator sealing replacement or other maintenance work. © 2015 Flowrox Oy. All rights reserved. Contents are subject to change without notice. SKW/ SKF-2015-09-ENG... -
Page 27: Dismantling The Valve Body
6. Clean the body (1) from the inside and ensure that the bores are flawless. 7. When all valve parts have been cleaned and inspected, continue to Valve assembly. © 2015 Flowrox Oy. All rights reserved. Contents are subject to change without notice. -
Page 28: Valve Assembly
5. Continue to the tower and actuator assembly in the next chapter. Figure 15.Detail of timber insert. © 2015 Flowrox Oy. All rights reserved. Contents are subject to change without notice. SKW/ SKF-2015-09-ENG... -
Page 29: Tower And Actuator Assembly
6. Install the bottom cover plate (12) and tighten the bottom cover bolts (10). 7. Continue to test the stroke in the next chapter. Figure 16.Tightening the tower mounting bolts. © 2015 Flowrox Oy. All rights reserved. Contents are subject to change without notice. SKW/ SKF-2015-09-ENG... -
Page 30: Testing And Adjusting The Valve Stroke
5. Run a few open/close cycles and leave the valve open. If the valve operates smoothly, it is ready to be installed on the pipeline. Follow the Installation instructions. © 2015 Flowrox Oy. All rights reserved. Contents are subject to change without notice. -
Page 31: Troubleshooting
Check gate for scrapes and bending and change if Damaged gate damaged * Manually operated valves are actuated with normal hand force. © 2015 Flowrox Oy. All rights reserved. Contents are subject to change without notice. SKW/ SKF-2015-09-ENG... -
Page 32: Appendix A: Main Measurements Of Skw And Skf Valves
2049 1831 1834 G 1” millimeters, but flushing 1962 2180 1962 2015 G 1” connections are in inches. 2250 2323 2291 2234 G 1” © 2015 Flowrox Oy. All rights reserved. Contents are subject to change without notice. SKW/ SKF-2015-09-ENG... - Page 33 1834 G 1” dimensions are in 1961 2180 1962 2015 G 1” millimeters, but flushing 2250 2291 2234 G 1” connections are in inches. © 2015 Flowrox Oy. All rights reserved. Contents are subject to change without notice. SKW/ SKF-2015-09-ENG...
- Page 34 FLOWROX OY P.O. Box 338 FI-53101 Lappeenranta, Finland Tel. +358 (0)201 113 311 Fax +358 (0)201 113 300 E-mail: sales@flowrox.com www.flowrox.com...