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Reliable DDX Instructions For Installation, Operation Care And Maintenance

For single interlock preaction systems
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Instructions for Installation,
Operation, Care, and
Maintenance
Wet Pilot Line,
Dry Pilot Line, and
Electric Actuation Trims
Reliable Automatic Sprinkler Co., Inc., 103 Fairview Park Drive, Elmsford, New York 10523
Bulletin 749 January 2021
Model DDX
Single Interlock Preaction Systems
2" (50 mm), 2½" (65 mm), 3" (80 mm),
76 mm, 4" (100 mm), 6" (150 mm),
165 mm & 8" (200 mm)
•
Electric Release Trim Available with 175 psi (12.1
bar) or 300 psi (20.7 bar) Rated Solenoid Valve
•
Electric Release Trim and Wet Pilot Trim Utilizing 7
to 10 psi (0.5 to 0.7 bar) Pneumatic Supervising
Pressure
•
Dry Pilot Trim Utilizing 8 psi to 28 psi (0.6 to 1.9
bar) Pneumatic Supervising Pressure
•
Externally Resettable Clapper
•
One Main Drain
Model DDX Single Interlock Preaction
(Shown with Electric Actuation Trim)

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Summary of Contents for Reliable DDX

  • Page 1 Pneumatic Supervising Pressure • Dry Pilot Line, and Externally Resettable Clapper • One Main Drain Electric Actuation Trims Model DDX Single Interlock Preaction (Shown with Electric Actuation Trim) Reliable Automatic Sprinkler Co., Inc., 103 Fairview Park Drive, Elmsford, New York 10523...
  • Page 2 At the heart of the Reliable Single Interlock Preaction System thereby flowing water into the fire sprinkler piping. Water flowing is the Model DDX Deluge Valve. This deluge valve is a hydrau- into the system will flow through the intermediate chamber of...

  • Page 3: System Operation

    (Only when used with Reliable Trim Sets.) and elevation requirements for the installation of dry pilot sprin- 1. Reliable 2” (50 mm), 2½” (65 mm), 76 mm, 3” (80 mm), 4” klers/detectors. (100 mm), 165 mm, 6” (150 mm) and 8” (200 mm) Electric...
  • Page 4 Fig. 1...
  • Page 5 Water also flows through the alarm outlet to the alarm devices. the appropriate mechanical fittings. A grooved-end outlet Resetting the clapper of the Model DDX Deluge Valve is ac- coupling is one way to achieve this; or complished using the convenient external reset knob on the rear •...
  • Page 6 Fig. 2...

  • Page 7: System Design Considerations

    7 psi occurrence(s) of a “water hammer” effect, which can in- (0.5 bar). For such cases, Reliable recommends the use of a deed damage the valve. A “water hammer” in the water...
  • Page 8 The Low-pressure actua- ferential latching clapper type valve. Deluge valve construction tor shall be Reliable Model LP Dry Pilot Line Actuator. The Dry shall be of lightweight, ductile iron construction with a screw in Pilot Line Single Interlock Trim shall also include a low air pres- stainless steel seat.

  • Page 9: Compressed Air Supply

    Assembly shall be pressure air compressor panel containing a 1/16 hp air com- a Reliable Nitrogen Regulating Device. This device is to be used pressor, DPDT relay for remote supervisory annunciation, low in conjunction with the Reliable Model A Pressure Maintenance pressure warning light, pressure gauge, and low pressure alarm Device.
  • Page 10 • Flange Dimensions Technical Data Reliable Single Interlock Preaction Systems, with associated Nominal Bolt Bolt Flange Flange Number Flange Pipe Circle Hole Outside Thick- trim, size 2” (50 mm), 2½” (65 mm), 76 mm, 3” (80 mm), 4” T ype:...

  • Page 11: Maintenance

    Pilot Actuator, allowing water to flow through the actua- assembled to the Model DDX Deluge Valve (with or without a tor. When all air has been expelled from the release line, control valve).
  • Page 12 MODEL DDX HYDRAULIC FRICTION LOSS GRAPH FLOW RATE (L/SEC) 0.05 0.01 1000 10000 FLOW RATE (GPM) Fig. 3...
  • Page 13 Fig. 4...
  • Page 14 4. Remove the bumpstop nuts and remove the seal as- listed in the “Resetting Model DDX Deluge Valve Single Inter- sembly . Install a new seal assembly and thread the lock Preaction Systems”...
  • Page 15 8. Using Reliable P/N 6881603000 Seat Wrench for 2” star pattern. Set up the Model DDX Deluge Valve as per the sec- (50mm), 2½” (65mm), 76mm and 3” (80mm) valve tion “Resetting Model DDX Deluge Valve Single Interlock Preac- sizes, Reliable P/N 6881604000 for 4” (100mm) valve tion Systems”.
  • Page 16 Seat O-Ring 7. Reinstall the actuator and set up the system following the section Bolt “Resetting Model DDX Single Interlock Preaction Systems.” Compression Spring Note: Parts list provided for information only. Available only as an assembly; individual parts are not available.
  • Page 17 Fig. 6...
  • Page 18 Model DDX (Screw-In Seat Configuration) Deluge Valves Parts List Part No. Item 2" 2½" 3" 4” 6” 8" Part Description QTY. Material 76mm 165mm (50mm) (65mm) (80mm) (100mm) (150mm) (200mm) 91006011 91006012 91006023 91006013 91006005 91006027 91006007 91006028 Valve Body Groove/Groove...

  • Page 19: Service Kits

    Ordering Information Service Kits Specify: Service kits are available for routine servicing of the valve (ref- Model DDX Single Interlock Preaction Sys- erence Figure 6). Service kits for the Model DDX Deluge Valve include the following components: • Size •...
  • Page 20 End to end take out of Model DDX valve with grooved inlet. End to end take out of Model DDX valve with flanged inlet where available (see page 10; also reference Bulletin 519). Not applicable to 76mm or 165mm systems, or systems using a flanged inlet Model DDX valve.
  • Page 21 End to end take out of Model DDX valve with grooved inlet. End to end take out of Model DDX valve with flanged inlet where available (see page 10; also reference Bulletin 519). Not applicable to 76mm or 165mm systems, or systems using a flanged inlet Model DDX valve.
  • Page 22 End to end take out of Model DDX valve with grooved inlet. End to end take out of Model DDX valve with flanged inlet where available (see page 10; also reference Bulletin 519). Not applicable to 76mm or 165mm systems, or systems using a flanged inlet Model DDX valve.

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