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Electric Pilot Operated Valve
Installation and Maintenance Instructions
Safe operation of these products can only be guaranteed if they are properly installed,
commissioned, used and maintained by qualified personnel (see Section 1.11) in compliance
with the operating instructions. General installation and safety instructions for pipeline and
plant construction, as well as the proper use of tools and safety equipment must also be
complied with.
1.1 Intended use
Referring to the Installation and Maintenance Instructions, name-plate and Technical
Information Sheet, check that the product is suitable for the intended use / application.
i)
The products have been specifically designed for use on steam, air or water/condensate.
The products' use on other fluids may be possible but, if this is contemplated, Spirax
Sarco should be contacted to confirm the suitability of the product for the application
being considered.
ii) Check material suitability, pressure and temperature and their maximum and minimum
values. If the maximum operating limits of the product are lower than those of the system
in which it is being fitted, or if malfunction of the product could result in a dangerous
overpressure or overtemperature occurrence, ensure a safety device is included in the
system to prevent such over-limit situations.
iii) Determine the correct installation situation and direction of fluid flow.
iv) Spirax Sarco products are not intended to withstand external stresses that may be
induced by any system to which they are fitted. It is the responsibility of the installer to
consider these stresses and take adequate precautions to minimise them.
v)
Remove protection covers from all connections and protective film from all name-plates,
where appropriate, before installation on steam or other high temperature applications.
1.2 Access
Ensure safe access and if necessary a safe working platform (suitably guarded) before
attempting to work on the product. Arrange suitable lifting gear if required.
1.3 Lighting
Ensure adequate lighting, particularly where detailed or intricate work is required.
Type 25E and 26E Electric Pilot Operated Valve (for Steam or Air Service)
IM-P717-02-US Issue 1
Type 25E and 26E
(for Steam or Air Service)
1. Safety information
IM-P717-02-US
Issue 1
© Copyright 2023
1
Printed in US
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Table of Contents
Related Manuals for Spirax Sarco 25E
Summary of Contents for Spirax Sarco 25E
- Page 1 Determine the correct installation situation and direction of fluid flow. iv) Spirax Sarco products are not intended to withstand external stresses that may be induced by any system to which they are fitted. It is the responsibility of the installer to consider these stresses and take adequate precautions to minimise them.
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Page 2: Pressure Systems
Post ‘warning notices’ if necessary. Type 25E and 26E Electric Pilot Operated Valve (for Steam or Air Service) IM-P717-02-US Issue 1... -
Page 3: Residual Hazards
Customers and stockists are reminded that under EC Health, Safety and Environment Law, when returning products to Spirax Sarco they must provide information on any hazards and the precautions to be taken due to contamination residues or mechanical damage which may present a health, safety or environmental risk. - Page 4 30 - 50 metre intervals Steam Trap set Steam Trap set Trap set Condensate Condensate Condensate Steam Mains - Do's and Don'ts: Flow Flow Steam Steam Type 25E and 26E Electric Pilot Operated Valve (for Steam or Air Service) IM-P717-02-US Issue 1...
- Page 5 Use correct torque figures. Flange bolts should be gradually tightened across diameters to ensure even load and alignment. Prevention of tensile stressing continued on next page Type 25E and 26E Electric Pilot Operated Valve (for Steam or Air Service) IM-P717-02-US Issue 1...
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Page 6: Thermal Expansion
Guides Guides Small lateral Limit movement rods Medium Fixing point distance Limit rods Small lateral movement Guides Guides Large lateral movement Large lateral movement Type 25E and 26E Electric Pilot Operated Valve (for Steam or Air Service) IM-P717-02-US Issue 1... - Page 7 Condensate Return Line Spirax Sarco 25E Electric Control Valve Spirax Sarco Fig. 2 Controlling Temperature of Greenhouse or Other Similar Buildings Strainer Condensate Return Line Type 25E and 26E Electric Pilot Operated Valve (for Steam or Air Service) IM-P717-02-US Issue 1...
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Page 8: Installing The Valve
2. Installing the valve Cap nut Fig. 3 Sizes ½" - 2" Type 25E and 26E Electric Pilot Operated Valve (for Steam or Air Service) IM-P717-02-US Issue 1... -
Page 9: Unpack Carefully
It is strongly recommended that strainers be installed before the regulating valve and steam traps. (Figures 1 and 2) Make certain adequate clearance is provided for screen removal and blowdown connection between strainer and regulating valve body. Type 25E and 26E Electric Pilot Operated Valve (for Steam or Air Service) IM-P717-02-US Issue 1... -
Page 10: How It Works
Main valve will close tight by the force of head spring and steam or air pressure acting on valve head. Main diaphragm Type 25E Electric Type 25E and 26E Electric Pilot Operated Valve (for Steam or Air Service) IM-P717-02-US Issue 1... - Page 11 Main valve Inlet Fig. 6 Inlet Control pressure Control pressure Main diaphragm Main diaphragm Type 25E Electric On-Off Regulator Type 25E Electric On-Off Regulator Type 25E and 26E Electric Pilot Operated Valve (for Steam or Air Service) IM-P717-02-US Issue 1...
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Page 12: Maintenance
Maintenance General inspection While a program of planned maintenance is always to be recommended, the 25E Regulator will give long and trouble-free service is correctly selected, installed and kept reasonably free of dirt and foreign matter. Dirt and foreign matter are most likely to collect during installation and later trouble can be avoided by inspecting the installation a few days later. - Page 13 Make certain pressure plate (1G) is set properly. Care should be taken in centering the diaphragms properly and equalizing bolt take-up uniformly. Type 25E and 26E Electric Pilot Operated Valve (for Steam or Air Service) IM-P717-02-US Issue 1...
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Page 14: Spare Parts Kits
Spare parts kits and coils are available. Refer to: TI-P717-09-US for ½" to 4" Main Valve TI-1-1121-US for 6" Main Valve - 25-Series, Only. TI-P235-02-US for Pilot Valves Type 25E and 26E Electric Pilot Operated Valve (for Steam or Air Service) IM-P717-02-US Issue 1... - Page 15 “A" and when reassembling diaphragms. Size ½" 1" 1¼" 2" 2½" 3" 4" 6" ¾" 1½" Dimension A 1/16" 5/64" 3/32" 1/8" 13/64" 13/64" ¼" 27/64" Type 25E and 26E Electric Pilot Operated Valve (for Steam or Air Service) IM-P717-02-US Issue 1...
- Page 16 (e) Actuating device, that (e) Check and correct. is, timer, thermostat or programmer may be defective. (f) Bypass valve leaking (f) Check and correct. Type 25E and 26E Electric Pilot Operated Valve (for Steam or Air Service) IM-P717-02-US Issue 1...
- Page 17 (h) On steam applications, (h) Check and repair, if steam trap draining necessary. equipment may not be functioning properly. Type 25E and 26E Electric Pilot Operated Valve (for Steam or Air Service) IM-P717-02-US Issue 1...
- Page 18 Type 25E and 26E Electric Pilot Operated Valve (for Steam or Air Service) IM-P717-02-US Issue 1...
- Page 19 Type 25E and 26E Electric Pilot Operated Valve (for Steam or Air Service) IM-P717-02-US Issue 1...
- Page 20 Spirax Sarco Applications Engineering Department Toll Free at: 1-800-883- 4411 SPIRAX SARCO, INC. 1150 NORTHPOINT BLVD. BLYTHEWOOD, SC 29016 PHONE 803-714-2000 FAX 803-714-2222 www.spiraxsarco.com/global/us Type 25E and 26E Electric Pilot Operated Valve (for Steam or Air Service) IM-P717-02-US Issue 1...