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SAPAG
Attention
The safety of lives and property often
depends on the proper operation of the
pressure relief valves. Consequently, the
valves should be kept clean and should be
periodically tested and reconditioned to
make sure they function properly.
WARNING
Suitability of the material and product for
the use contemplated by the buyer is the
sole responsibility of the buyer. Also storage,
installation and proper use and application are
the sole responsibility of the purchaser.
Emerson disclaims any and all liability arising
out of same.
Any installation, maintenance, adjustment,
repair and testing performed on pressure relief
valves should be done in accordance with
the requirements of all applicable Codes and
Standards under which those performing such
work should maintain proper authorization
through appropriate governing authorities.
No repair, assembly and test work done by
other than Emerson shall
be covered by the warranty extended by
Emerson to its customers. You assume full
responsibility for your work. In maintaining
and repairing
Emerson products you should use only parts
manufactured by Emerson. Call your nearest
Emerson regional sales
office or representative for a Emerson service
engineer should you wish assistance with your
field needs.
Emerson.com/FinalControl
Sapag Safety Valves Series 8400/8500/8490/8590
Installation and Maintenance Instructions
Table of Contents
• Style 8500/8590
11. Emerson Valves & Controls' Field Services and Repair Programs
Ordering Information
© 2017 Emerson. All rights reserved.
without notice
SAPDR-0060-EN-1308
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Table of Contents
Related Manuals for Emerson SAPAG 8400 Series
Summary of Contents for Emerson SAPAG 8400 Series
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Page 1: Table Of Contents
• Operating Pressure too close to Set Pressure • Chatter • Incorrectly Adjusting Lifting Gear • Other Causes of Seat Leakage • Corrosion 11. Emerson Valves & Controls’ Field Services and Repair Programs Ordering Information Emerson.com/FinalControl © 2017 Emerson. All rights reserved. without notice... - Page 2 3. Insurance Spare Parts: Valve parts exposed to process or environmental wear and/or corrosion and may require replacement as part of a major repair. Emerson Valves & Controls recommends that sufficient inventory of spare parts be maintained to support process requirements.
- Page 3 2. The valve serial number is shown on the valve nameplate. Spare parts may be ordered from any Emerson Valves & Controls Regional Sales Office or Representative.
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Page 4: Introduction
The inlet connection bolts or studs should be drawn down evenly to avoid straining the valve body with possible distortion of the nozzle flange or base. Emerson reserves the right to change the contents without notice page 4... -
Page 5: Outlet Piping
The “as received from service” condition of a pressure relief valve is a most useful tool in establishing the proper time interval between inspections. Emerson reserves the right to change the contents without notice page 5... -
Page 6: The Test Bench
This will permit returning to the original setting in case of error. Emerson reserves the right to change the contents without notice page 6... -
Page 7: Cold Differential Test Pressure Adjustments
Table 4 may be set on air at ambient temperature, provided 401-1000 the correction factors in Table 5 are applied to the valve set pressure. 1001-1500 Emerson reserves the right to change the contents without notice page 7... -
Page 8: Seat Leakage Tests
Figure 5 - Seat leak apparatus for 150 & 300 lb. outlets 1 inch through 10 inch sices Emerson reserves the right to change the contents without notice page 8... -
Page 9: Valve Maintenance
(refer to table 7) is provided in the disc insert for insertion of a removal bolt. Follow instructions for metal seated insert removal. Bolt Figure 7 Remove disc insert by pulling on bolt Emerson reserves the right to change the contents without notice page 9... -
Page 10: Cleaning
Lapping block Remachining the insert will change critical dimensions, affect the action of the valve and is not recommended. Figure 9 Emerson reserves the right to change the contents without notice page 10... -
Page 11: Lapping Blocks
If machining of the nozzle seat or other major repairs are necessary it is recommended that the after valve be returned to a Emerson Valves & Controls facility for repair. All parts must be accurately lapping machined per Sapag specifications. No pressure relief valve will be tight, nor will it operate properly unless all parts are correctly machined. -
Page 12: Assembly
• Install the cap or lifting device. See Figure 13 for lifting lever assembly. • Seal the cap or lifting lever device and nozzle ring set screw to prevent tampering. Emerson reserves the right to change the contents without notice page 12... - Page 13 Seal and wire Packed lifting lever with test rod Type E Spindle nut Cotter pin Forked lever Cotter pin Cap set screw Lever Regular lifting lever Type C Emerson reserves the right to change the contents without notice page 13...
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Page 14: Assembly Of Cap And Lifting Lever Devices
2-228 O-ring soft seat or vice versa. 2-230 2-337 2-346 2-352 2-438 Emerson reserves the right to change the contents without notice page 14... -
Page 15: Style Variations
On the valve nameplate the valve serial number is shown. Spare parts may be ordered from any Emerson Valves & Controls Regional Sales Office or Representative. 10. Trouble Shooting Pressure Relief Valves Troubles encountered with pressure relief valves can vitally affect the life and performance of the valve and must be corrected at the first possible opportunity. -
Page 16: Distortion From Piping Strains
Emerson Valves & Controls Field Service provides on-site, in line testing and repair capability for all types of pressure relief devices. • Parts Emerson Valves & Controls will help you establish the right mix of on-site spares with Emerson Valves & Controls’ own distribution and manufacturing support. • Training Emerson offers intensive factory or on-site seminars to improve maintenance and application skills.