ITT GFH45 Instruction And Maintenance Manual

Enidine / Conoflow

105 Commerce Way
Westminster, SC 29693
Tel: [phone]
Fax: [phone]

INSTRUCTION AND MAINTENANCE MANUAL

GFH45 PRESSURE REGULATOR

CAUTION: These instructions should be read
carefully prior to installation, use or
maintenance.

GENERAL PRODUCT OVERVIEW

Conoflow’s GFH45 Series Airpak®, Filter-Regulator is
used to provide clean, accurate air to instruments,
valves, positioners, transducers and other pneumatic
control devices. This unit’s design provides high flow
capability, durable materials of construction and bubble
tight shut-off.

The GFH45 Regulator has a maximum supply pressure
capability of 300 PSIG (2.07 MPa) with control output
settings of 0-25, 0-60 and 0-125 PSIG (0-172, 0-414 and
0-862 kPa). This brass filter regulator boasts a high flow
delivery rate and excellent droop characteristic.

This regulator is offered with ¼” NPT inlet and outlet
ports, two outlet gauge ports, and brass construction. A
handwheel or wrench knob adjustments are standard.

CAUTION: Maximum Supply Pressure is 300
PSIG (2.07 MPa)

WARNING: This product is not recommended
for use with flammable liquids or gasses.

WARNING

Conoflow’s products are designed and
manufactured using materials and
workmanship required to meet all applicable
standards. The use of these products
should be confined to services specified
and/or recommended in the Conoflow
catalogs, instructions, or by Conoflow
application engineers.

To avoid personal injury or equipment
damage resulting from misuse or
misapplication of a product, it is necessary
to select the proper materials of
construction and pressure-temperature
ratings which are consistent with
performance requirements.

MATERIALS OF CONSTRUCTION

Nozzle Assembly: Brass with Buna N Soft Seat
Range Spring: Zinc Plated Carbon Steel
Diaphragm Assembly: see CED Code
Bowl: Brass
Body: Brass
Bonnet: Brass

SPECIFICATIONS

Maximum Supply Pressure: 300 psig (2.07 MPa)

Outlet pressure ranges are determined by the last
character in the regulator model number.
“C” 25 psig (172 kPa)
“F” 60 psig (414 kPa)
“G” 125 psig (862 kPa)

Proof Pressure: 150% of maximum operating
Burst Pressure: 400% of maximum operating

Flow Capacity: 20 scfm (see flow chart)
Temperature Range: -20 °F to 165 °F

(-29 °C to 74 °C)

Sensitivity: 0.02 psi (0.14 kPa)
Connections: ¼” NPT Inlet and Outlet Ports,

Two-¼” NPT Gauge Ports

(90° from Outlet Port)

Weight: 3.4 lb (1.55 kg)
REGULATOR CLEANING

The GFH45 pressure regulator is cleaned to ITT
Conoflow specification ES8A 01 1 when option B is
selected in position 6 of the model number.

GFH45-IOM Rev. 0 12/18
Printed in USA

INSTALLATION

CAUTION: The regulator must be installed with the

draincock downward to allow accumulated fluid to
drain out when the draincock is opened.

CAUTION: Moisture and particulates can be
discharged at high speed when draincock is
opened.

The GFH45 can be line mounted, panel mounted, or wall
mounted (reference G6018006 wall-mount bracket).

Teflon tape is the preferred thread sealant for the 1/4”
NPT connections.

Connect the supply to the port marked “IN”. The other
ports are outlet and factory plugged outlet gauge ports.

WARNING

port, regulator damage or unexpected flow through the
regulator could occur.

Prior to applying inlet pressure, double check the
connections and assure the wrench knob or hand wheel
is backed out sufficiently to unload the range spring in
the bonnet.

Carefully apply inlet pressure and check the supply
connection for leakage. Adjust the output pressure by
rotating the wrench knob or hand wheel clockwise and
check the outlet connection for leakage.

: If the supply line is connected to the outlet

WARNING: The handwheel or wrench knob can vibrate

loose and fall out if the jam nut is not tightened.

Figure 1 – Regulator dimensions with 1/4” NPT connections. For certified dimensional drawing, see A17-83.

Page 2 of 6 GFH45-IOM Rev. 0 12/18 Printed in USA