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Emerson YARWAY 9100 ARC Series Installation, Operation And Maintenance Instructions

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YARWAY 9100 SERIES ARC
INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS
Before installation, these instructions must be read carefully and understood.
GENERAL
The 9100 Series ARC
Valve is an automatic,
®
modulating, recirculation control valve for
protection of centrifugal pumps and high speed
pumps against overheating and possible
unstable operation during low-load periods.
With only three moving parts (disc, seal and
spring), the valve functions simultaneously as:
(1) check valve – to prevent flow through
the pump and function as a flow sensor and
(2) bypass control valve – to maintain the
minimum pump flow and provide pressure
letdown.
Emerson.com/FinalControl
VALVE
®
© 2017 Emerson. All Rights Reserved.
FEATURES
1. Five separate functions in a single valve
body without external power source:
(a) reverse flow prevention, (b) low flow
detection, (c) modulating bypass flow
control, (d) bypass flow pressure reduction,
and (e) back pressure regulation of bypass
flow (as required).
2. Compact, self-contained design that
eliminates divided installation responsibility
occurring with systems involving
combinations of pneumatic, thermal and
mechanical devices.
3. Minimum wear on vital parts during
pressure reduction of bypass flow.
4. Quiet pressure drop provided by a bypass
that dissipates the energy effectively.
For high pressure drop capability and/
or increased cavitation resistance a back
pressure regulator is available. External
bypass regulators are available for
mounting in down stream piping.
5. Corrosion resistant surfacing of disc seat.
6. Steel or stainless steel body available.
Elastomer seals allow usage to 475°F
[246°C]. Service exceeding these
temperatures use the extreme temperature
valve design. Refer to separate manual
supplement for information.
7. Available with materials covered by NACE.
Standard MR0175 (sulfide stress cracking
resistant metallic material for oil field
equipment).
8. All connections flanged.
9. Field Replaceable flow element (seat
insert) for ease of maintenance and ability
to modify flow characteristics as system
requirements change.
Engineering Doc. #965849 Rev. H
VCIOM-07087-EN 19/06

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Summary of Contents for Emerson YARWAY 9100 ARC Series

  • Page 1 8. All connections flanged. 9. Field Replaceable flow element (seat insert) for ease of maintenance and ability to modify flow characteristics as system requirements change. Engineering Doc. #965849 Rev. H Emerson.com/FinalControl VCIOM-07087-EN 19/06 © 2017 Emerson. All Rights Reserved.

  • Page 2: Operation

    50 psi [3.5 bar] to 500 psi [34.5 bar] above the receiver vessel pressure on the bypass element (as determined by Emerson). The back pressure regulator is available for mounting in downstream piping. The controlled fit between the disc assembly,...

  • Page 3: Operational Check

    If operational checks indicate a deviation from the original specifications and Receiver vessel field adjustments are necessary, contact the Pump warm-up Emerson for additional information. line (optional) VALVE CARE Except for periodic operational checks the valve requires little maintenance. The disc assembly,...

  • Page 4: Repair And Inspection

    YARWAY 9100 SERIES ARC VALVE ® INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS CAUTION 5. Lay the disc-bypass bushing assembly on a Lock nut The back pressure regulator has an integral flat surface with the bottom of the disc up. spring and if the draw bolt is removed, it should Push down on the spring retainer (36) until be done carefully.
  • Page 5 YARWAY 9100 SERIES ARC VALVE ® INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS REASSEMBLY – ALL CLASSES 2" to 8" [50 to 200 mm] valve sizes 1. All parts must be clean prior to reassembly. 2. Torque the upper guide bushing nut to the following values (Table 2) Do not lubricate. TABLE 2 –...
  • Page 6 YARWAY 9100 SERIES ARC VALVE ® INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS TABLE 4 – BODY BONNET NUTS Valve Size Nut Size Torque [mm] ft/lb [N•m] 1 - 1½ [25 - 40] - 12 65 - 70 [88 - 95] [50] ⅝...
  • Page 7 YARWAY 9100 SERIES ARC VALVE ® INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS 1" to 1 ½" [25 to 40 mm] valve sizes 8. Install the bypass tube (35) into the body 1. All parts must be clean prior to reassembly. outlet, threaded end first. Thread the tube 2.

  • Page 8: Parts And Materials

    YARWAY 9100 SERIES ARC VALVE ® INSTALLATION, OPERATION AND MAINTENANCE INSTRUCTIONS Disc-bypass bushing assembly All surfaces in contact with one another should be completely coated with a modurate amount of lubricant. Instert the O-ring into the 1" to 1½" [25 to 40 mm] valves groove of the body and completely seat the insert into the body.
  • Page 9 Responsibility for proper selection, use, and maintenance of any product remains solely with the purchaser and end user. Yarway is a mark owned by one of the companies in the Emerson Automation Solutions business unit of Emerson Electric Co. Emerson Automation Solutions, Emerson and the Emerson logo are trademarks and service marks of Emerson Electric Co.

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