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RuptureSeal
Model
NRS-3
COMBINATION...
Non-Fragmenting
Metal
Rupture Disk &
Backup
Relief Valve...
...for use on Low Pressure Centrifugal Chillers
Manufactured in accordance with
ASHRAE Guideline 3-1990 Sec. 4.6
Flow Tested per ASME Standards
Redi Controls, Inc.
Installation Operation & Maintenance Manual
™
R-11
R-113
Patent Number 5,644,930
R-123
File Literature No. 1027-02
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Summary of Contents for Redi Controls RuptureSeal NRS-3
- Page 1 Redi Controls, Inc. Installation Operation & Maintenance Manual File Literature No. 1027-02 RuptureSeal ™ Model NRS-3 COMBINATION... Non-Fragmenting Metal Rupture Disk & Backup Relief Valve... Patent Number 5,644,930 ...for use on Low Pressure Centrifugal Chillers R-11 R-113 R-123 Manufactured in accordance with ASHRAE Guideline 3-1990 Sec.
- Page 2 Revised Technically as of May 1, 1995 This Copy was Printed as of February 4, 2005 © 1995 INDIANAPOLIS SPECIALTY VALVE, INC., IND’PLS, IN This product is marketed and sold by Redi Controls, Inc., under license from Indianapolis Specialty Valve, Inc.
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Page 3: Table Of Contents
Table of Contents ............................Page GENERAL INFORMATION......................4 Specifications ..........................5 General Overview ........................5 Installation Kit ..........................6 Field Provided Items ........................6 INSTALLATION .........................7 Figure 1. - Typical Installation .....................8 Figure 2 - Vent Pipe Hook-up .....................8 Figure 3 - Cutaway View......................9 Figure 4 - Pressure Gauge ......................9 Figure 5 - Optional Alarm......................9 Figure 6 - Double Check Pressure Equalizing Valve ..............10 Figure 7 - Supplemental Support ....................10... -
Page 4: General Information
GENERAL INFORMATION YOU ARE URGED TO READ THIS MANUAL COMPLETELY BEFORE INSTALLING THIS VALVE Upon Receiving Your Unit Contact Equipment Servicing Inspect the unit for possible damage caused during shipping. before attempting to use a damaged unit. (800) 626-8640 or (317) 865-4130. Warnings and Cautions Warnings Cautions... -
Page 5: Specifications
Specifications • Flow capacity: 2128 SCFM • Set pressure: 15 psig • Refrigerant compatibility: R-11, R-113 & R-123 • Weight: 37 pounds • Dimensions: installed length 14 inches, height 17 inches, width 8 inches • Calibration is factory sealed to prevent inadvertent tampering or dis-assembly General Overview The RuptureSeal™... -
Page 6: Installation Kit
Installation Kit Kit includes: One (1) Pre-assembled NRS-3 RuptureSeal™ which includes: NOTE: See Figures One non-fragmenting metal rupture disk 15 (PSI) 3 on Page 9 and 6 on One flange gasket Page 10 for Four (4) flange bolts with nuts location of One (1) Tell-Tale pressure gauge 30”... -
Page 7: Installation
INSTALLATION Installation of the RuptureSeal™ should be performed only by qualified personnel. The following installation instructions should be thoroughly read and understood before attempting installation. Alterations to the existing rupture disk vent piping and removal of existing carbon rupture disk are necessary to install the NRS Series RuptureSeal™... -
Page 8: Figure 1. - Typical Installation
INSTALLATION (continued) 1. Determine the best mounting arrangement for the RuptureSeal™ in relation to the chiller’s existing relief outlet and vent piping. Also determine if supplemental support for the valve will be necessary (see Figure 7 on page 10). Note that the valve body can be rotated 360° to orient the outlet to the vent pipe. -
Page 9: Figure 3 - Cutaway View
INSTALLATION (continued) (39) Stem Seal (25) Pull Ring (26) Tension Bar (30) Spring (17) Pin hole for spring locking (23) Water drain hole in when servicing O-Rings issolation chamber (16) Calibration locking screws and seal (8) Outlet to Vent Pipe (29) Spring tension adjusting mechanism and isolation chamber upper part... -
Page 10: Figure 6 - Double Check Pressure Equalizing Valve
Double Check Pressure Equalizing Valve (22) The double check pressure equalizing valve is provided to (22) Double Check (34) Filter/Vent Pressure prevent pressure build-up between the RuptureSeal™ valve Equalizing (21) Pressure Valve seat and the rupture disk. This special double check pressure Guage equalizing valve allows low pressure build-up to bleed-off, but (43) Stainless Steel... -
Page 11: Leak Testing Procedure
Leak Testing Procedure Caution : DO NOT use this procedure if chiller pressure is lower than 15” Hg. Otherwise, the rupture disk may implode into the chiller! (35) (14) 1. Remove pipe plug (or optional Rupture Alarm™ if used) from alarm port of Connector 2. - Page 12 (24) 5. Inspect water drain hole in valve body to make sure it can drain properly. (32) 6. Lightly oil valve body O-Ring and reinstall valve body on valve nozzle 7. Make sure the five (5) valve body locking screws are screwed completely in against the valve (32) nozzle...
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Page 13: Following A Rupture
Following a Rupture Perform “Annual” maintenance procedures (steps 1 thru 12 - pages 11 and 12). When it becomes necessary to replace the rupture disk, the appropriate instructions will accompany the replacement disk. Therefore, only brief replacement instructions are given here. The non-fragmenting rupture disk cassette is fragile and requires careful handling, therefore this part of the valve should only be serviced after a rupture or if the disk is determined to be defective or leaking.. -
Page 14: Appendix "A" (Table For Determining Size Of Vessel Nrs-3 Can Be Installed On)
Appendix “A” ™ RuptureSeal Model NRS-3 (2128 SCFM) R-11 R-113 R-123 Purpose of Table This table will assist the installer in determining the maximum size of chiller vessel (evaporator) with a three inch (3”) relief port that can be fitted with the Model NRS-3 RuptureSeal™ valve. (NOTE: Because the RuptureSeal™... -
Page 15: Appendix "B" (Excerpt From Guideline Bsr/Ashrae 15-1992R)
Appendix “B” Excerpt from Guideline BSR/ASHRAE 15-1992R 9.7.5 The minimum required discharge capacity of the pressure-relief device or fusible plug for each pressure vessel shall be determined by the following: C = f DL WHERE: minimum required discharge capacity of the relief device in POUNDS OF AIR PER MINUTE (KG/S), (emphasis and asterisk added) outside diameter of vessel... -
Page 16: Appendix "C" (Non-Typical Installations And Their Effect On Valve's Operation)
Appendix “C” The NRS-series valves can be mounted in various positions (other than upside down!). (The following illustrations depict some of the various mounting positions. Vertical Mounting Mounting variations from simply rotating the valve body (7): The drawings below illustrate the typical vertical mounting positions for the NRS-series valves, with variations obtain by rotating the valve body. -
Page 17: Parts List
Parts List for NRS-3 Name of Part Part Number 1. 30” Hg - 0 - 30 psi GAUGE RS-G1 2. Double Check Pressure Equalizing Valve RS-DCV1 3. Non-fragmenting metal rupture disk (15 psi) NRS-3-15 psi 4. Flange Gasket NRS-3 GAS 5. -
Page 18: Warranty
• Labor or other charges incurred in removing or reinstalling any REDI CONTROLS product or part. • Damages resulting from use of a REDI CONTROLS product for any purpose other than for which it was designed and manufactured. • Any implied warranty of merchantability or fitness for any particular purpose, occurring after the Warranty Period.
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