Emerson Spence Type N6 Instruction Manual Download Page 8

Type N6

Emerson Automation Solutions

SpenceValve.com

Americas 

McKinney, Texas 75070 USA 

T   +1 800 558 5853 

+1 972 548 3574

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Asia Pacific

 

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Middle East and Africa 

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SIOI97

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Summary of Contents for Spence Type N6

Page 1: ... the Type N6 differential pressure valves Introduction Scope of the Manual This manual provides instructions for the installation troubleshooting maintenance valve setting and parts ordering for Type N6 differential pressure valves Product Description Type N6 differential pressure valves are designed to maintain pump discharge pressures at a constant differential above a separate source of pressur...

Page 2: ...CL250 Pressure Rating 1 250 psig 17 2 bar Temperature Rating 1 350 F 177 C Spring Ranges 5 to 50 psid 0 34 to 3 4 bar d 40 to 125 psid 2 76 to 8 62 bar d 100 to 200 psid 6 89 to 13 8 bar d 1 The pressure temperature limits in this Instruction Manual and any applicable standard or code limitation should not be exceeded Table 1 Type N6 Differential Pressure Valve Rated Flow Coefficients BODY SIZE FL...

Page 3: ...he initial pressure acts against the working face of the disk and tends to move it open Opposing the opening are the forces of the differential adjusting spring and the loading pressure acting on the piston The differential adjusting spring force creates the differential between the retained pressure supply main or boiler feed water under the disk and the loading pressure return main or boiler dru...

Page 4: ...re service conditions could exceed the limits given in the Specifications section and or valve nameplate Additionally physical damage to the valve may result in personal injury or property damage due to escaping of accumulated gas To avoid such injury and damage install the valve in a safe location Under enclosed conditions or indoors escaping gas may accumulate and be an explosion hazard In this ...

Page 5: ...ign material may be between the seat and disk of the main valve b Line from steam header may be plugged restricted or broken c Differential adjusting spring setting may have been tampered with d Chamber C may be dirt plugged or port in bushing key 19 may be plugged e O ring or piston may be damaged and leaking To avoid possible personal injury from spring or pressure loaded actuator make sure that...

Page 6: ...Gasket Asbestos WAL5 02381 0 WAL5 02362 0 WAL5 02382 0 WAL5 02365 0 WAL5 02366 0 WAL5 02367 0 11 Cylinder Bronze WAL4 01569 1 WAL4 01570 1 WAL4 01571 1 WAL4 01572 1 WAL4 01573 1 WAL4 01574 1 12 Sealing Ring Viton WAL5 04021 0 WAL5 04026 0 WAL5 10463 0 WAL5 04034 0 WAL5 04044 0 WAL5 04048 0 13 Stem Locknut Steel WAL5 03015 0 WAL5 03016 0 WAL5 03016 0 WAL5 03017 0 WAL5 03017 0 WAL5 03018 0 14 Piston...

Page 7: ...1 2 3 4 23 24 25 5 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 1 4 NPT Figure 3 Type N6 Assembly Drawing SERIAL NUMBER PLATE 7 Type N6 ...

Page 8: ...re property of their prospective owners The contents of this publication are presented for informational purposes only and while every effort has been made to ensure their accuracy they are not to be construed as warranties or guarantees express or implied regarding the products or services described herein or their use or applicability All sales are governed by our terms and conditions which are ...

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