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Installation, Operation Maintenance Instructions for 'W' – Series Diaphragm Actuator
General Information
The purpose of this manual is to guide the process of
unpacking, installation, and maintenance of Severn 'W'
Series
Pneumatic
Linear
recommended that the users and personnel responsible
for maintenance read this manual before proceeding to
install, operate or perform any procedures on the actuator.
Instructions as per the manual are followed to avoid
mishaps and injuries.
Spare Parts
It is highly recommended that original parts from the
manufacturer are used for servicing Severn Actuators.
USE
OF
THIS
MANUAL,
ENVIRONMENTAL AND OTHER SAFETY NOTICES
This manual to be read in conjunction with Severn
"Supplementary Installation, Erection, Maintenance and
Operating Procedures" documents and other related O &
M instructions relating to accessories fitted to the Control
Valve. All notices, warnings and guidance given in that
manual are also applicable to this document.
INTENDED USE
Reference is to be made to the Control Valve Specification
Sheet, Installation and Operation Instructions, nameplate
to check product is suitable for the intended use /
application.
See Installation, Operation and Maintenance Instructions
for Severn Control and Choke valves information on the
following (latest edition):
1. MACHINERY DIRECTIVE INCORPORATED INTO A
MACHINE
2. ATEX DIRECTIVE
3. PRESSURE EQUIPMENT DIRECTIVE PED
4. ENVIROMENTAL and OTHER LEGISLATION &
IPPC DIRECTIVE
5. RETURNING PRODUCTS
www.severnvalve.com
Actuators.
It
is
highly
LEGAL
DIRECTIVES,
DISPOSAL
Unless otherwise stated in the Instructions, this product
is recyclable, and no ecological hazard is anticipated
with its disposal providing due care is taken
If any doubts exist, contact Severn quoting the valve
serial number
Safety: Always ensure safe working practices are
followed:
Always isolate valve before maintenance.
Always use lockout methods to ensure
safety
Poison risk: Do not incinerate PTFE. Do
not smoke whilst handling PTFE.
Caution: Do not put hands inside yoke
area
Always use correct tools. Do not over
tighten. Do not use extension bars to
force movement
Always read the manual. If any doubts
exist, contact SEVERN quoting the
valve serial number.
WARNING: When ordered, the actuator and or control
valve configuration and materials of construction are
selected to meet particular pressure, temperature,
pressure drop and controlled fluid conditions. Personal
injury, property damage, equipment damage, or leakage
due to escaping gas or bursting of pressure containing
parts may result if the actuator and or control valve or its
ancillaries are over pressured or installed where service
conditions exceed the actuator and control valve design
limits.
1
Version:
W Series Actuator -1.1/03/2025
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Summary of Contents for Severn W Series
- Page 1 If any doubts exist, contact Severn quoting the valve install, operate or perform any procedures on the actuator. serial number Instructions as per the manual are followed to avoid mishaps and injuries.
-
Page 2: Installation
Installation maintenance information for Severn W Series actuators only. Please refer to separate manuals for instructions Make sure adequate overhead clearance exists when covering the valve, positioner, and any accessories. installing the actuator. Minimum clearance is 150mm. It... - Page 3 2. Ensure to check proper functioning of the actuator by ensure the specified fail position is attained. stroking the valve to the fully closed and open positions. The piston rod should have a smooth linear motion. W Series Actuator -1.1/03/2025 www.severnvalve.com Version:...
- Page 4 Ensure actuators fail safe position is attained by removal of air supply. Ensure the air filter regulator is checked, and the cartridge is replaced whenever required. Figure 1: Bolted Bonnet & Split Clamp Actuator Stem Coupling W Series Actuator -1.1/03/2025 www.severnvalve.com Version:...
- Page 5 Respectively the gland flange set up is loosened and removed. respectively the lock nut is removed too. Note: The above procedure specifically for Severn globe valves. Refer respective valve manuals. Ensure to cut the supply and remove it from the valve.
-
Page 6: Actuator Reassembly
The Cover plate assembly comprises of Cover plate, sealing box and ‘O’ – Rings. Cover plate Figure 3: Severn Glocon ‘W’ Series Reverse Acting ‘O’- Rings and Sealing box ‘O’- rings are replaced with (AFC) Actuator – Cross Sectional View new ones and respectively assembled. -
Page 7: Operation
To close the valve, turn the hand-wheel clockwise to extend the plug. Figure 4: Severn Glocon ‘W’ Series Direct Acting (AFO) Actuator – Cross Sectional View 3.To return the valve to automatic control, return the hand-wheel indicator to the neutral position and set the three-way bypass valve (see previous NOTE) to ‘Auto’. - Page 8 Based on application replace Spring in actuator to be crosschecked Position spring. with specification sheet. Unacquirable Respective Valve troubleshoots Valve maintenance to be done before Valve Internal Problem to be referred. disassembly of actuator. W Series Actuator -1.1/03/2025 www.severnvalve.com Version:...
- Page 9 Valve Internal Problem to be referred. disassembly of actuator. SEVERN CONTACT DETAILS www.severnvalve.com Severn Glocon Valves PVT Limited (Unit 1) Document Version: W Series Actuator -1.1/03/2025 F96/97, SIPCOT Industrial Park, Irungattukottai, Chennai:602117, India T: +91(0)44 67102300 / 67102800 Severn Glocon Valves PVT Limited (Unit 2)
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