Mooney Flowgrid - User Manual

Flowgrid
®
Regulator
Installation/Operation/Maintenance Manual
MOONEY
®
FLOWGRID
®
REGULATOR
Table of Contents
Product Description ..............................................................1
Valve Markings .....................................................................3
Nameplate Information .........................................................3
Principles of Operation ..................................................... 4-5
Hydrostatic Testing ...............................................................5
Installation ........................................................................ 6-7
Piping Details .................................................................. 7-10
Start-up and Operation .......................................................11
Maintenance ................................................................ 13-14
Troubleshooting ..................................................................15
Warranty .............................................................................16
Product Description
The Flowgrid
®
valve is an easy to maintain valve designed
to be used primarily with a self contained pilot system. The
Flowgrid
®
valve has several unique features that add to its
versatility such as:
In line maintenance.
■
Replaceable trim.
■
Reversible trim parts.
■
Dual flow elements for added capacity or redundancy.
■
Non stretching fabric reinforced diaphragm for stability and
■
fast response at all temperatures.
Positive spring shutoff.
■
Two-stage pressure drop to minimize noise and provide
■
cavitation protection.
Refer to Figure 1 (Page 2).
All Flowgrid
®
valves 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 valves share the same principle of operation.
The body (1) is available with single or dual ports. The
dual port design (figure 3) can provide redundant control if
equipped with dual pilots or be used with a single pilot for
maximum capacity.
Scope
This manual provides installation, operation, and maintenance instructions for the Flowgrid
®
valve and regulator. Instructions for
the Series 20 Pilot will be found in a separate manual.

Mooney Flowgrid Specifications

General

Application	Flow measurement and control
Category	Control Unit
Output Current	4-20 mA
Temperature Range	-40°F to 185°F (-40°C to +85°C)
Operating Temperature	-40°F to 185°F (-40°C to 85°C)
Protection Rating	IP65
Housing Material	Aluminum
End Connections	Flanged, threaded, or welded

Summary

Product Description

Key Features of Flowgrid Valve

Details unique features like in-line maintenance, replaceable and reversible trim, dual flow elements, and reinforced diaphragm.

Principles of Operation

Pressure Reducing Regulator (PRV) Operation

Describes how the Flowgrid valve functions in a pressure reducing application, showing closed and partially open states.

Back Pressure Regulator (BPV) Operation

Explains the valve's operation as a back pressure regulator, illustrating closed and partially open conditions.

Installation Guidelines

General Installation Precautions

Pilot System Installation

Installation Warnings

Critical safety warnings regarding overpressure, leaks, and proper installation location to prevent injury or damage.

Start Up and Operation

Pressure Reducing Regulator Start Up

Step-by-step instructions for starting up the Flowgrid valve in a pressure reducing application.

Back Pressure Regulator Start Up

Procedure for safely starting up the Flowgrid valve as a back pressure regulator or relief valve.

Standby Monitor Operation

Setting Up Standby Monitor

Procedure for configuring the operating and monitor regulators in a standby setup.

Checking Standby Monitor Performance

Working Monitor Operation

Setting Up Working Monitor

Instructions for configuring the 1st and 2nd stage regulators in a working monitor system.

Troubleshooting Guide

Initial Troubleshooting Steps

Key verification steps including checking specifications, piping, and regulator sizing.

Common Regulator Problems

Addresses issues like failure to shut off, erratic control, and instability with potential causes and solutions.

Failure Mode Diagnosis