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Dresser MOONEY FLOWGRID SLAM SHUT, Инструкция по установке, эксплуатации и обслуживанию

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Mooney Controls
Dresser, Inc.
Salt Lake City, Utah

Slam Shut Sense

Under Pressure

Trip Control 

Valve

Over Pressure

Trip Control 

Valve

Filter

Type 30

Restrictor

Type 24

Pilot Sense

Pilot Series 20

Loading

Outlet

Inlet

Outlet

Vent Valve

Latched

Vent

Actuator

Flowgrid Regulator &

Integral Slam Shut Valve

Flapper Valve 

(Open Position )

Center Port

Flowgrid Slam Shut |  3

 Figure 4 – Slam Shut Nameplate

 Figure 5 –  Actuator & Latch Mechanism Open

Nameplate Information

 Flowgrid Nameplate information, see the Flowgrid IOM.

 5.  The Slam Shut Nameplate location.

6.  The Flowgrid Nameplate location.

7.  The flow direction is marked on the spring case or cover 

(“INLET” and/or a flow arrow). Proper alignment assures 
that the diaphragm guide on the Spring Case is aligned 
toward outlet side of the regulator.

8.  The % Capacity tag indicates the capacity of the throttle 

plate (100%, 75%, 50%, & 35%) in the valve. 

 

NOTE: On all 2” standard port valves the throttle plate 
itself is stamped. This tag is not installed on stand 
alone Slam Shuts.

9.  Over 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.

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 
goods.

VITON

The Slam Shut has nitrile static 
seals and viton dynamic seals and 
diaphragms.

MAX INLET

Maximum inlet pressure psig/bar

MIN DIFF

Minimum difference in inlet and 
downstream pressure required for 
the Slam Shut to operate. 

OP. TEMP.

Operation Temperature range

 Principal of Operation

During normal operation the latch mechanism holds the 
closure element (flapper) open as shown in Figure 5. The 
sense or downstream pressure is monitored by the high and/
or low trip controller diaphragms. The controller diaphragms 
convert the sense pressure into a force proportional to the 

pressure. The force produced by the controller diaphragm is 
counter balanced by the set point adjustment spring located 
in the spring case. The adjusting screw is used to vary the 
spring force and control the over pressure set point or the 
under pressure set point. 

Содержание MOONEY FLOWGRID SLAM SHUT

Страница 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...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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...

Страница 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...

Страница 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...

Страница 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...

Страница 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 ...

Страница 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 ...

Страница 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...

Страница 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 ...

Страница 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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