2 | Baker Hughes
Copyright 2021 Baker Hughes Company. All rights reserved.
The Slam Shut can be provided in one of three different actuator
assemblies:
1. Overpressure protection only
2. Underpressure protection only
3. Overpressure and Underpressure protection.
The 1 inch Mooney Slam Shut has several unique features such
as:
•
Easy to maintain; only two bolts required to remove entire
Slam Shut assembly
•
Resistant to sticking due to freezing water or debris in
pipeline
•
Well contained moving mechanical parts resistant to
vibration effects
•
Excellent performance and accuracy across a large pressure
range by changing only the spring
•
External visual indicator to show when the unit is tripped
•
Easy to reset; only three caps need to be removed for
complete reset
•
High cycle applications; only one wear component
•
No pressure differential requirements for full shutoff
•
Spring Case Vent Chamber may to pressurized for remote
trip or remote change of setpoint
Materials of Construction
Valve Body, Bleed Plate &
Spring Case
Carbon Steel (WCB)
Throttle Plate
17-4 PH or A515
Slam Shut Seat
SST
Slam Shut Seal
Nitrile
Flowgrid Diaphragm
Nitrile or Viton
Flowgrid Spring
SST
Slam Shut Housing, Slam
Shut Spring Cases
Aluminum
Spring Cover
Aluminum
Rotating Shaft
SST
Main Shaft Guide
Delrin
End Cap
Lexan
Plug Seal
Nitrile
O-Rings
Nitrile
Over Pressure Set Point Ranges
Spring Color
Spring Range
Accuracy (% of
Set Point)
(2)
psig
Bar
Red
5 - 10
0.35 - 0.7
10
Silver
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
(2)
Preliminary AG Data, Testing per EN 14382
Specifications
Sizes
1” NPT & SWE1.25” NPT & SWE
Types
Stand Alone or Integrated into
Flowgrid
Pressure
Protection
Standard: OverOptional: Over and/
or Under
Temperature
(1)
-20°F to 150°F(-29°C to 65°C)
Maximum
Operating Inlet
Pressure
740 psig (50 Bar)
Operating Sense
Pressure
5 to 450 psig (.35 Bar to 31 Bar)
Response Time
< .25 seconds
(1)
EN 14382 restricts the minimum temperature to -4° F (-20° C).
Under Pressure Set Point Ranges
Spring Color
Spring Range
Accuracy (% of
Set Point)
(2)
psig
Bar
Red
5 - 10
0.35 -0.7
2.5
Silver
10 - 40
0.7 - 3
2.5
Blue
40 - 90
3 - 6
2.5
Purple
90 - 175
6 - 12
1.0
Black
175 - 250
12 - 17
1.0
White/Green
250 - 450
17 - 31
1.0
