Dresser MOONEY FLOWGRID SLAM SHUT Installation, Operation & Maintenance Manual Download Page 18

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Dresser

Vent Valve Disassembly and Assembly

Refer to Figure 16 for this operation.

1. Remove the stem retainer, stem, washer and spring from

the controller housing. Discard the o-ring and stem.

2. Lubricate and install a new o-ring on the valve stem

retainer.

3. Insert the long end of the stem into the retainer. Slide the

washer and then spring on the short end of the new stem.

4. Insert the stack into the controller housing and tighten to

120 to 130 inch-lbs.

Installation of the Cartridge

Refer to Figure 16 for this operation.

1. Start the cartridge into its bore.

2. Tighten the cartridge to 120 to 130 inch-lbs.

Spring Case Assembly

Refer to Figure 16 for this operation.

1. Install the diaphragm assembly into the diaphragm

counter bore.

2. Lubricate the depression in spring follower with

Lubriplate 105 or equivalent.

3. Place the spring for the set point range required on top of

the diaphragm assembly. Set the spring follower on top
of the spring.

4. Make sure the diaphragm assembly, spring and spring

follower are oriented correctly and install the spring case
with the bug vent facing forward. Install the four bolts and
torque to 120 to 130 inch-lbs.

Actuator Disassembly and Assembly

Refer to Figure 16 for this operation.

1. Remove the four cap screws, actuator cap, diaphragm,

restrictor pin and o-rings. Disassemble the diaphragm
assembly. Discard o-rings and diaphragm.

2. Remove the pawl lever actuator pin from the controller

housing. Discard the pin if damaged or worn. Install the
pin in the controller housing.

3. Lubricate the o-rings in the rebuild kit with the lubricant

provided.

4. Install an o-ring on the diaphragm bolt followed by the

diaphragm plate. Install a diaphragm on the diaphragm
retainer bolt. Make sure the convex side of the diaphragm
is toward the diaphragm plate.

5. Install the washer followed by the nut on the bolt and

torque the nut to 120 to 130 in-lbs.

6. Install an o-ring on each end of the restrictor pin. Install

the restrictor pin with the o-rings into the diaphragm cap.

7. Place the diaphragm assembly in the housing. Install the

diaphragm cap and torque the four screws to 120 to
130 inch-lbs.

Adjusting

Screw

Bug Vent

Cap

Screw

Spring
Follower

Main Spring

Spring
Housing

Nut

Controller
Housing

Spring

Case Label

Cartridge
Assembly

Controller
Label

Vent Spring

Washer

Plug & Stem

Vent Valve
Seat

Actuator Cap

Cap Screw

O-Ring

Plate

Washer

Restrictor
Pin

Nut

Stud

O-Ring

Bolt

Figure 16 – Controller Assembly

Summary of Contents for MOONEY FLOWGRID SLAM SHUT

Page 1: ...embly with a cover and a slam shut device and a controller The Series 50 and 50D controller mounts on the side of the 2 through 4 shut off valves The Flowgrid Regulator and Shut Off Valve consists of a Flowgrid regulator with a shut off valve inserted between the Flowgrid body and the regulator with a side mounted Series 50 or 50D Controller The controller can be supplied in three different config...

Page 2: ...ds Spring Range and Accuracy Spring Color Outlet Pressure Range Accuracy of Set Point psig Bar Plated 10 40 0 7 3 5 Blue 40 90 3 6 2 5 Purple 90 175 6 12 2 5 Black 175 250 12 17 2 5 White Green 250 450 17 31 2 5 Under Pressure Inlet Pressure Sensitivity for data contact Dresser factory engineering Figure 3 Valve Markings Valve Markings 1 American National Standards Institute ANSI pressure class ra...

Page 3: ...ory marks the nameplate to indicate which spring is installed during manufacture If the spring is changed make sure to note it on the nameplate 10 Under pressure spring range nameplate The factory marks the nameplate to indicate which spring is installed during manufacture If the spring is changed make sure to note it on the nameplate Item Definition NITRILE The Slam Shut has all nitrile soft good...

Page 4: ...re set point or is less than the optional under pressure set point the controller diaphragm and spring move opening a valve The open valve allows the sense pressure to flow under the latch diaphragm see Figure 6 The pressure acts on the diaphragm which pushes on the pin The pin moves the L shaped pawl lever and releasing the flapper lever When the flapper lever is released a set of springs pushes ...

Page 5: ...position the best position being one that provides easiest access for the slam shut pilot adjustment and maintenance 4 SCREWED END VALVES Apply pipe compound to the male threads starting one or two threads back from the end prior to assembling the joint 5 FLANGED END VALVES Use suitable line gaskets and good bolting practices with flanged bodies A crisscross pattern of incrementally tightening the...

Page 6: ...nternal rubber components can be heated beyond their max temperature rating causing potential damage 13 CONTROL LINES Control lines should be run from the pilot mounted on the Flowgrid valve to a point 8 to 10 pipe diameters minimum of straight pipe downstream from the valve Refer to Piping Schematics Use Table 1 as a guide for the ideal tubing to use Reduce as neces sary to connect to the pilot O...

Page 7: ...lators with Slam Shut back pressure control 7 4 3 10 6 5 8 8 10 Straight Pipe Diameters 1 Flowgrid inlet port tap on valve body plugged hidden 2 Type 30 Filter inlet connected to the center port on the shutoff valve 3 Type 30 Filter outlet connected to the inlet of the Type 24 Restrictor 4 Type 24 Restrictor mounted to the inlet port of the Series 20 Pilot 5 Series 20 Pilot loading port connected ...

Page 8: ...20 Pilot outlet port connected to the Flowgrid regulator outlet port tap 8 Series 20 Pilot sense port connected to the piping downstream of the operating regulator 9 Series 50 Controller sense port connected to the piping the slam shut is protecting Operating Regulator 10 Series 20 Pilot Cartridge controls the downstream pressure 11 Type 30 Filter inlet connected to the inlet port tap on the Flowg...

Page 9: ...bled in PRV mode pressure reducing 11 Series 20 Pilot 2 controls the downstream pressure if the 2nd stage regulator fails 12 Series 20 Pilot 2 outlet port connected to the Flowgrid regulator outlet port tap 13 Series 20 Pilot 2 sense port connected to the piping downstream of the 2nd regulator 2nd Stage Regulator 14 Series 20 Pilot 3 controls the downstream pressure 15 Type 30 Filter inlet connect...

Page 10: ...ted to the inlet port of the Series 20 Pilot 5 Series 20 Pilot loading port connected to the Flowgrid regulator loading port 6 Series 20 Pilot outlet port connected to the outlet port tap on the Flowgrid regulator 7 Series 20 Pilot sense port connected to the piping the regulator is controlling the pressure 8 Series 50 Controller sense port connected to the piping the slam shut is protecting 9 Pil...

Page 11: ...incorrect the label spring and or valve may need to be changed out See the maintenance section for instructions in making the changes 2 On dual function controllers equipped with over pressure and under pressure protection the over pressure set point should be made first with the under pressure protection screw completely backed out Setting the Over Pressure Set Point 1 Remove the cover on top of ...

Page 12: ...rs this can be accomplished by backing off the pilot set point adjusting screw Remove the cover from the front of the controller Close the slam shut by inserting a flat bladed screw driver under the bottom of the pawl lever and lifting The flapper valve should close Bleed the pressure off downstream of the slam shut Install the cover on the controller and latch module Pressurize the slam shut inle...

Page 13: ... a inch hex wrench remove the three cap screws holding the controller and latch module to the shut off valve body 7 The flapper lever is press fit on the shaft making removal difficult The lever is easily pulled off by using the control ler housing to drive it off the shaft Grab the controller on each side and rapidly pull the housing so it drives the lever off If necessary repeat the action 8 Rem...

Page 14: ...ve Housing Flanged Bushing Figure 11 Shut Off Valve Assembly and Disassembly 2 Shown Spring Case Spacer O Ring Capacity Tag Body Seal Diaphragm Throttle Plate Shutoff Valve Assembly Nut Spacer Main Spring Roll Pin Stud Roll Pin Body Seal 2 CL 300 RF Flanged Disassembly of the Shut off Valve 1 Remove the rear reset nut and discard o ring The threads are right hand on the rear reset nut and must tur...

Page 15: ...slam shut body 11 Install the o rings on the bushing Slide the bushing onto the shaft and push it into the slam shut body as far it will go CAUTION Do not damage the sealing bead on the flapper or the shut off valve will leak If the pins stick up above the flapper they will cut the seal and cause the shut off valve to leak Assembly of the Shut off Valve onto the Body and or Regulator Refer to Figu...

Page 16: ...ng Housing Nut Controller Housing Spring Case Label Maintenance of the Controller Spring Case Disassembly 1 Remove the over or under pressure set point adjusting screw cover located on top of the spring case Loosen the adjusting screw 2 Remove the four bolts from the spring case and controller and latch module 3 Remove the spring case and spring ...

Page 17: ... Plate Figure 14 Over Pressure Assembly and Disassembly Working on this assembly except in a clean environ ment may result in internal leakage Any dirt or debris on or that migrates onto the valve seat or poppet may cause permanent damage to the seat and will cause the valve to leak 1 Remove the cartridge from the controller housing 2 Disassemble the cartridge Remove and discard the seat and body ...

Page 18: ... and torque to 120 to 130 inch lbs Actuator Disassembly and Assembly Refer to Figure 16 for this operation 1 Remove the four cap screws actuator cap diaphragm restrictor pin and o rings Disassemble the diaphragm assembly Discard o rings and diaphragm 2 Remove the pawl lever actuator pin from the controller housing Discard the pin if damaged or worn Install the pin in the controller housing 3 Lubri...

Page 19: ... set point too high under pressure set point higher than the over pressure set point under pressure set point is set too close to the over pressure set point The downstream sense pressure is not between the over and under pressure set points Over or under pressure valve dirty or damaged Over or under pressure valve o ring damaged Vent valve plugged Pawl lever does not unlatch the flapper The over ...

Page 20: ... NO REPRE SENTATION OR WARRANTY OF ANY KIND EXPRESS OR IMPLIED AS TO MERCHANTABILITY FITNESS FOR PARTICULAR PURPOSE OR ANY OTHER MATTER WITH RESPECT TO ANY OF THE PRODUCTS While the information in this manual is presented in good faith and believed to be accurate Dresser Mooney Regulators Dresser Inc does not guarantee satisfactory results from reliance on such information Dresser Mooney Regulator...

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