GE Mooney Flowgrid Instruction Manual
GE Oil & Gas
Mooney*
Flowgrid* Regulator
Instruction Manual
GE Data Classification : Public
i | GE Oil & Gas © 2015 General Electric Company. All rights reserved.
THESE INSTRUCTIONS PROVIDE THE CUSTOMER/OPERATOR WITH IMPORTANT PROJECTSPECIFIC REFERENCE INFORMATION IN ADDITION TO THE CUSTOMER/OPERATOR’S NORMAL
OPERATION AND MAINTENANCE PROCEDURES. SINCE OPERATION AND MAINTENANCE
PHILOSOPHIES VARY, GE (GENERAL ELECTRIC COMPANY AND ITS SUBSIDIARIES AND AFFILIATES)
DOES NOT ATTEMPT TO DICTATE SPECIFIC PROCEDURES, BUT TO PROVIDE BASIC LIMITATIONS
AND REQUIREMENTS CREATED BY THE TYPE OF EQUIPMENT PROVIDED.
THESE INSTRUCTIONS ASSUME THAT OPERATORS ALREADY HAVE A GENERAL UNDERSTANDING
OF THE REQUIREMENTS FOR SAFE OPERATION OF MECHANICAL AND ELECTRICAL EQUIPMENT
IN POTENTIALLY HAZARDOUS ENVIRONMENTS. THEREFORE, THESE INSTRUCTIONS SHOULD BE
INTERPRETED AND APPLIED IN CONJUNCTION WITH THE SAFETY RULES AND REGULATIONS
APPLICABLE AT THE SITE AND THE PARTICULAR REQUIREMENTS FOR OPERATION OF OTHER
EQUIPMENT AT THE SITE.
THESE INSTRUCTIONS DO NOT PURPORT TO COVER ALL DETAILS OR VARIATIONS IN EQUIPMENT
NOR TO PROVIDE FOR EVERY POSSIBLE CONTINGENCY TO BE MET IN CONNECTION WITH
INSTALLATION, OPERATION OR MAINTENANCE. SHOULD FURTHER INFORMATION BE DESIRED
OR SHOULD PARTICULAR PROBLEMS ARISE WHICH ARE NOT COVERED SUFFICIENTLY FOR THE
CUSTOMER/OPERATOR’S PURPOSES THE MATTER SHOULD BE REFERRED TO GE.
THE RIGHTS, OBLIGATIONS AND LIABILITIES OF GE AND THE CUSTOMER/OPERATOR ARE
STRICTLY LIMITED TO THOSE EXPRESSLY PROVIDED IN THE CONTRACT RELATING TO THE SUPPLY
OF THE EQUIPMENT. NO ADDITIONAL REPRESENTATIONS OR WARRANTIES BY GE REGARDING
THE EQUIPMENT OR ITS USE ARE GIVEN OR IMPLIED BY THE ISSUE OF THESE INSTRUCTIONS.
THESE INSTRUCTIONS ARE FURNISHED TO THE CUSTOMER/OPERATOR SOLELY TO ASSIST
IN THE INSTALLATION, TESTING, OPERATION, AND/OR MAINTENANCE OF THE EQUIPMENT
DESCRIBED. THIS DOCUMENT SHALL NOT BE REPRODUCED IN WHOLE OR IN PART WITHOUT
THE WRITTEN APPROVAL OF GE.
Mooney Flowgrid Regulator Instruction Manual | 1© 2015 General Electric Company. All rights reserved.
Table of Contents
Product Description ............................................................................ 1
Regulator Markings ............................................................................. 3
Nameplate Information .................................................................... 3
Principles of Operation ...................................................................... 4
Hydrostatic Testing ............................................................................. 5
Installation ............................................................................................... 6
Product Description
The Mooney Flowgrid regulator is an easy to maintain
regulator designed to be used primarily with a self
contained pilot system. The Flowgrid regulator has
several unique features that add to its versatility such as:
In line maintenance
Replaceable trim
Reversible trim parts
Non stretching fabric reinforced diaphragm for
stability and fast response at all temperatures
Positive spring shutoff
Two-stage pressure drop and optional noise controller
to minimize noise and provide cavitation protection
Scope
This manual provides installation, operation, and maintenance instructions for the Mooney Flowgrid regulator.
Instructions for the Mooney Series 20 pilot and Mooney noise controller will be found in a separate manual.
Piping Details .......................................................................................... 7
Start-up and Operation .................................................................. 11
Maintenance ....................................................................................... 13
Troubleshooting ................................................................................. 15
Warranty ................................................................................................ 17
Product Support ................................................................................. 17
GE has secured global PED EN 334 certification for
its Mooney Flowgrid regulators demonstrating our
commitment to quality and safety. The certification was
awarded by DVGW (the German Technical and Scientific
Association for Gas and Water), one of the world’s most
recognized industry certification bodies and the largest
gas and water industry certification agency in Europe.
GE has also secured the following verifications: ISO 9901,
ISO 14001, CRN along with others ensuring the safety
and quality of the Mooney regulator.
2 | GE Oil & Gas © 2015 General Electric Company. All rights reserved.
Materials of Construction
Body & Spring Case
ASTM A 216 WCB Carbon Steel
Spacer
ASTM A 216 WCB Carbon Steel
Throttle Plate
17-4PH Stainless Steel
Diaphragm
Nitrile/Nylon (Optional - Viton/Nylon)
O-Ring & Seals
Nitrile (Optional - Viton)
Bolting
ASTM 193 GR B-7 or Equal
Spring
301 Stainless Steel
Specifications
Sizes
1” - 12” (DN 25 - DN300)
Body Style
Single Port
10 inch and 12 inch Dual Ports
End Connections
Screwed, Socket Weld
Flanged, Flangeless & Buttweld
Temperature
-20°F to 150°F (-29°C to 66°C)
Min/Max Temperature
-40°F to 175° F (-40°C to 79° C)
Maximum Operating
Differential
800 psi (55.16 bar)
Maximum Emergency
Differential
1000 psi (68.9 bar)
(unless limited by body rating)
Minimum Differential
Refer to individual product
specification sheets
Cracking Differential
Refer to individual product
specification sheets
Maximum Inlet Pressure
1480 psig (102.1 bar)
(limited by flange or pilot rating)
Outlet Pressure Range
Limited by pilot
Flow Direction
Bi-Directional
1
Body Taps
1/4” - 18 NPT
1
Reverse flow by changing pilot connections and reversing spring case.
Table 1
Table 2
Figure 1 - Flowgrid Parts
All Mooney Flowgrid regulators have six main parts
(excluding bolting and O-rings); the body, throttle plate,
spacer, diaphragm, main spring, and spring case.
Although parts vary in size and design, all regulators
share the same principle of operation.
The body (1) is constructed with a single port (sizes
less than 10”) and a dual port (sizes greater than 10”).
The dual port design can provide redundant control if
equipped with dual pilots or be used with a single pilot
for maximum capacity.
The throttle plate (2) supports the diaphragm and
provides a machined surface that the diaphragm seals
against for bubble tight shutoff. Restricted capacity
plates of 35%, 50%, and 75% are available.
The spacer (3) creates a space between the throttle
plate and the diaphragm which forms a flow path
inside the regulator.
3
1
425
6
The fabric-reinforced diaphragm (4) is the main
working part of the Flowgrid regulator. The diaphragm
functions as both an actuator and the regulator
throttling element.
It is designed to provide stability, rangeability, and
fast response without stretching. It will not “take a set”
and is thick for durability and wear resistance.
The main spring (5) provides high frequency response,
proportional action for stability and a consistent
minimum differential regardless of temperature.
It also provides a positive closing force, which is
important in monitor regulation applications.
The spring case (6) is shaped to retain the main spring.
It provides a low volume cavity where loading pressure
from the pilot system is placed on top of the diaphragm
to control flow through the regulator.
Front View
Back View
Top View
Mooney Flowgrid Regulator Instruction Manual | 3© 2015 General Electric Company. All rights reserved.
Regulator Markings
Nameplate Information
1. American National Standards Institute (ANSI) pressure class rating of the regulator.
2. Line size of body.
3. ANSI pressure class rating of the flange.
4. Indication that the regulator has been hydrostatically tested according to code requirements.
5. The serial number is stamped on the spring case, spacer1, and body.
6. The Nameplate location.
7. The flow direction is marked on the spring case (“INLET” or “OUTLET”). 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 regulator.
1
NOTE: On all 1” regulators and 2” standard regulators the throttle plate itself is stamped.
Item Definition
Flowgrid
Registered name of regulator
Blank
CE marking
S/N
Serial number assigned to regulator
FG
Flowgrid model description
Size/Ends
Line size of body and type of end
connection
ANSI Cl
American National Standards Institute
pressure class
Max Inlet
Maximum inlet pressure (psig)/(bar)
YR
Year manufactured
Diff
Min/Max
Minimum differential required to fully
open regulator
Maximum allowable operating pressure
differential (psig)/(bar)
Max Temp
Maximum operating temperature in
degrees Fahrenheit
Bolt Torq
Ft-lbs/Nm
Recommended bolt torque for spring
case in foot pounds
Figure 2 - Regulator Markings
Figure 3 - Flowgrid Regulator Nameplate
Table 3
4 | GE Oil & Gas © 2015 General Electric Company. All rights reserved.
Figure 4 - Pressure Reducing Configuration Fully Closed
Principles of Operation
Pilot Supply Pilot Sense
Connection
Restrictor
Inlet Outlet
Pilot Outlet
Connection
Pilot Loading
Connection
INLET
Pilot Supply Pilot Sense
Connection
Restrictor
Inlet Outlet
Pilot Outlet
Connection
Pilot Loading
Connection
Figure 5 - Pressure Reducing Configuration Partially Open
At no flow, when the outlet pressure is greater than the
set point of the pilot regulator, the pilot is closed and full
inlet pressure loads the spring case through the pilot
loading connection. In this condition the diaphragm is
closed tightly against the throttle plate. The pressure
differential across the outlet half of the diaphragm adds
to the spring force in closing the Flowgrid regulator
(Refer to Figure 4).
As demand for flow occurs in the downstream system
the outlet pressure drops, causing the pilot regulator to
open and start bleeding pressure out of the spring case
faster than it can enter through the restrictor. Reducing
the pressure above the diaphragm allows the inlet pressure to progressively lift the diaphragm off the throttle
plate, opening the regulator and satisfying the demand
for flow in the downstream system. (Refer to Figure 5).
Pilot Supply
Pilot Sense
Connection
Restrictor
Inlet
Outlet
Pilot Outlet
Connection
Pilot Loading
Connection
Figure 7 - Back Pressure Configuration Partially Open
Figure 6 - Back Pressure Configuration Fully Closed
Pilot Supply Pilot Sense
Connection
Restrictor
Inlet Outlet
Pilot Outlet
Connection
Pilot Loading
Connection
When demand for flow ceases or is reduced, the
downstream pressure increases causing the pilot
regulator to close. Inlet pressure continues to pass
through the restrictor until the control pressure equals
the inlet pressure. The spring force, plus the pressure
differential across the outlet half of the diaphragm
closes the diaphragm against the throttle plate, shutting
off the flow (Refer to Figure 4).
Adjustment of the restrictor affects the response rate,
stability, and sensitivity of the regulator. Smaller restrictor openings result in higher gain (sensitivity) and slower
closing speeds. Larger openings result in lower gain
(greater proportional band), greater stability and faster
closing speeds.
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