ITT Industries GH31 Series Fixed Differential Regulators Instruction Manual
- June 3, 2024
- ITT Industries
Table of Contents
ITT Industries GH31 Series Fixed Differential Regulators
WARNING
Conofiow’s products are designed and manufactured using materials and workmanship required to meet all applicable industry standards. The use of these products should b confined to services specified and/or recommended in the Conoflow calaloo, instructions or by Conoflow application engineers (exceeding pressure-temperature rating or using devices tor services other than those specified). To avoid personal injury or equipment damage due to misuse or misapplication of a product, it is necessary to see the proper materials of construction and presSure-temperature ratings which are consistent with performance requirements.
PRINCIPLE OF OPERATION
The GH31 regulator maintains a constant pressure differential across an external valve or other residential, providing a constant flow rate, regardless of variations in upstream pressure. The pressure upstream of the needle valve is piped to the bonnet of the regulator and acts on the effective area of the diaphragm to create a downward force. This force is opposed by the pressure acting on the underside of the diaphragm and the compressed spring located under the plug which exerts an upward force equivalent to 3 PSl(21 kPa). Under operating conditions, the pressure downstream of the needle valve is always 3 PSl(21 kPa) less than the upstream pressure, thus the flow will remain constant for any given setting of the needle valve.
INSTALLATION
DIMENSIONS
NOTES
- ALL CONNECTIONS ARE 1/4 NPT
- ” + ” ADO 0.31(7.87) TO THIS DIM FOR GH21XTXKXS ANDGH31XTXKXK
- ( ) DIMENSIONS IN MILLIMETER
FOR CERTIFIED DIMENSIONAL DRAWING, REFER TO A17-18
CAUTION: Maximum Supply and Signal Pressure is 100 PSl(690 kPa).
Unit has three 1/4″ N.P.T. connections. The inlet connection is marked “IN” and is piped directly from the downstream side of the orifice. The bonnet connection is piped from the upstream side of the orifice. (See Figure 1). IT IS RECOMMENDED THAT A FILTERED AIR SUPPLY BE USED.
Check all connections for leakage after installation.
MAINTENANCE
Remove air supply pressure and bleed off output pressure prior to performing maintenance.
Periodic replacement of the diaphragm assembly and nozzle assembly is recommended for services where the unit is on stream continuously and where consistent, high-accuracy regulation is required. The frequency of replacement will depend on the nature of the service, cleanliness of air, humidity of the air, etc. To replace the diaphragm assembly (1), remove six screws (7) and lift off the bonnet (2). Place new diaphragm assembly (1) over body orienting diaphragm assembly over tapped holes. Place bonnet (2) over the diaphragm assembly and tighten six screws (7). The six screws should be tightened alternately. To replace nozzle assembly remove plug (3) and plug spring (9). Use ¾” socket wrench socket to remove and replace the nozzle retaining nut (4). Remove the nozzle (10) and “O” ring (5). Nozzle assembly may be cleaned by immersion in a suitable solvent and blow dry with the air stream.
- 6385336
- Spare Parts Kit
- 6385337
- Spare Parts Kit
- GH31 303 SI. Sri:
- 6385338
- Spare Parts Kit
- GH31 316 St. SU.
NOTES
- Recommended Spare Parts can be purchased individually or as a spare parts kit under number: (Consist of item 1 and 5).
- For the definition of catalog number, refer to Sales Bulletin C-2006.
- When ordering spare parts, specify complete catalog no., item no., and part no. This will permit positive identification and rapid handling of orders.
WARNING: MANUFACTURED WITH (1, 1, 1-TRICHLOROETHANE), A SUBSTANCE THAT HARMS PUBLIC HEALTH AND THE ENVIRONMENT BY DESTROYING OZONE IN THE UPPER ATMOSPHERE.
ITT CONOFLOW
- Highway 78 P.O. Box 768 St. George, South Carolina 294TT-0768
- Telephone: 803-563-9281
- FAX: (803)563-2131
WARNING: TECHNICAL DATA SUBJECT TO EAR CONTROLS
This document contains technical data whose export is restricted by the Export Administration Act of 1979, as amended (Title 50, U.S.C., App. 2401, et seq.) Violation of this export control law is subject to severe criminal penalties.