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Sapag Safety Valves Series 8400/8500/8490/8590

Installation and Maintenance Instructions

without notice

SAPDR-0060-EN-1308

Table of Contents

1. Introduction

2. Storage and Handling

3. Installation

Care in Handling
Inspection
Inlet Piping
Outlet Piping

4. Hydrostatic Pressure Tests

Hydrostatic Test of Vessel or System
Hydrostatic Test of Outlet System

5. Setting, Testing and Adjustments

New Valves
Reconditioned Valves
Valves Removed from Service
The Test Bench
Test Fluids
Valve Operation
Set Pressure Changes
Set Pressure Adjustment
Nozzle Ring Settings
• Style 8500/8590
Cold Differential Test Pressure Adjustments
• Temperature Correction
• Back Pressure Correction
Seat Leakage Tests
• Metal-to-Metal Seated Valves
• Soft Seated Valves

6. Valve Maintenance

Visual Inspection and Neutralizing
Disassembly
Cleaning
Inspection
Reconditioning of Valve Seats
Lapping Procedures
• Lapping Blocks
• Lapping Compounds
• Machining of Nozzle Seats
• Machining of Disc Insert Seats
Assembly
Assembly of Cap and Lifting Lever Devices
Soft Seat Construction

7. Style Variations

8. Service Records

9. Spare Parts

10. Trouble Shooting Pressure Relief Valves

Seat Leakage
• Seats Damaged by Foreign Matter
• Distortion From Piping Strains
• 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

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.

SAPAG

Emerson.com/FinalControl

© 2017 Emerson. All rights reserved.

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Содержание SAPAG 8400 Series

Страница 1: ...y Adjusting Lifting Gear Other Causes of Seat Leakage Corrosion 11 Emerson Valves Controls Field Services and Repair Programs Ordering Information 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 S...

Страница 2: ...2 Bonnet Stud Nut 24 Adjusting Bolt 25 Adjusting Bolt Nut 26 Pipe Plug 27 Set Screw Gasket 1 28 Guide Gasket 2 29 Tailpiece Gasket 1 34 Seal Wire 35 Seal Clip 36 Nameplate 40 Screwed Cap 41 Cap Gasket 1 Gasket Kit 1 4 42 Test Gag Plug Plug only shown 43 Test Gag plug gasket 1 Notes 1 Consumable Spare Parts Valve parts which should be replaced as part of any disassembly and discs and disc inserts w...

Страница 3: ...ling storage installation use or maintenance of any Emerson Valves Controls Product by a non Emerson Valves Controls employee may void any Emerson Valves Controls guarantees or warranties with respect to such Product All personnel working with Emerson Valves Controls products should be adequately trained and thoroughly familiar with the contents of the appropriate instruction manual s Emerson Valv...

Страница 4: ...fted or handled using the lifting lever Inlet and outlet protectors should remain in place until the valve is ready to be installed on the system Inspection Pressure relief valves should be visually inspected before they are installed to ensure that no damage has occurred during shipment or while in storage All protective material sealing plugs and any extraneous material inside the valve body or ...

Страница 5: ...ervice When the hydrostatic test must be performed with the valve in place a test gag may be used Sapag Series 8000 are provided with test gags as standard In the case of the Type C cap with lifting lever the lifting lever assembly must be replaced with a hydrostatic test cap and test rod prior to hydrostatic testing When test rods are used care must be exercised to prevent overtightening that cou...

Страница 6: ...vertent valve opening A strong high ring position is necessary to obtain a good clean popping action of the valve on air or gas with the limited volume available on the test bench a Not required for testing on liquid Remove the nozzle ring set screw and raise the nozzle ring until it touches the disc holder then back it down two 2 notches Exercise care in counting the number of notches moved so th...

Страница 7: ...est position with the valve closed contact with disc holder Table 2 8500 8590 Nozzle Ring Setting Orifice Size Total revolutions below highest lock position P and Q 3 4 Revolution R and T 1 Revolution Cold Differential Test Pressure Adjustments When a pressure relief valve is on a test bench at room temperature and atmospheric pressure and is to be installed on a system operating at a higher tempe...

Страница 8: ...inute shall be observed for at least one minute and shall not exceed the values indicated in table 6 below b Soft Seated Valves For soft seated valves there shall be no leakage for one minute zero bubbles for one minute Table 6 Maximum seat leakage rate Metal seated pressure relief valves Set Effective Orifice Sizes 0 307 In2 and Smaller Effective Orifice Sizes Larger than 0 307 In2 Pressure Max B...

Страница 9: ...sc insert 8 For balanced bellows valves Style 8490 8590 special care must be taken not to damage the bellows subassembly 6 If parts are difficult to remove due to the presence of corrosive or foreign materials soaking in a suitable solvent may be required i Remove the spindle from the disc holder j Lift the guide off the disc holder k Disc Insert Removal Table 7 Series 8000 disc insert threaded ho...

Страница 10: ...ected for evidence of cracking pitting or deformation that might develop into a leak The bearing surfaces on the guide and disc holder should be checked for residual product build up and any evidence of scoring Inspection of valve components is important to ensure proper valve performance Damaged valve parts must be repaired or replaced Reconditioning of Valve Seats The tightness of a valve and it...

Страница 11: ...on any damaged pressure relief valve seat except where the damage requires remachining The following lapping compounds or their commercial equivalents are suggested Grit Compound No Description 320 Medium Coarse 400 Medium 600 Fine 900 Polish Machining of Nozzle Seats If machining of the nozzle seat or other major repairs are necessary it is recommended that the valve be returned to a Emerson Valv...

Страница 12: ...older 5 and guide 15 by sliding the guide over the disc holder Note The guide for D and E orifice valves protrudes up into the valve bonnet f Install the two guide gaskets 28 one above and one below the guide Note When assembling bellows valves the bellows flange eliminates the need for a bottom guide gasket g While holding the top of the disc holder install the guide into the body Align the hole ...

Страница 13: ... Packed lifting lever with test rod Type E Spindle Adjusting bolt Adjusting bolt nut Seal and wire Cotter pin Cap top gasket Dog Dog shaft Cap top Spindle nut Cap Cap stud Cap stud nut Regular lifting lever Type C Cap Cotter pin Pin Lever Cap set screw Spindle nut Forked lever Cotter pin Pin Cap test rod Type B Threaded cap Low profile Type E Packed lifting lever Type H Bolted cap Low profile Type...

Страница 14: ...n the valve Install the dog shaft O ring in the dog shaft bearing and place the dog shaft bearing gasket on the dog shaft bearing Screw the dog shaft bearing into the cap Rotate the dog shaft so that the dog is pointing down and install the cap assembly onto the bonnet Rotate the dog shaft so that the dog contacts the spindle nut With the scribed line horizontal remove the assembly and adjust the ...

Страница 15: ... together with set pressure part name and item number valve size and style 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 correcte...

Страница 16: ...rosion may result in pitting of valve parts failure of various valve parts build up of corrosive products and general deterioration of the valve materials Corrosive attack is generally controlled through selection of suitable materials or by employing a bellows seal to isolate the valve spring adjusting bolt spindle and guiding surfaces from the corrosive attack of the process fluid Environmental ...

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