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Hansen HA4AS - User Manual

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ADDITIONAL FEATURES
Tolerant of Dry Systems
For Ammonia, R22, R134a and other Hansen-
Approved Refrigerants
Wide Range of Options
Inlet, Outlet, or Differential Pressure
Wide Pressure Ranges
Electric Shut-Off, Dual, or Wide-Opening Available
Safe Working Pressure: 400 psig (28 bar g)
CSA Certified, CRN for Canada
Weld-In-Line Available; Contact Factory
INTRODUCTION
These advanced-design, strong-bodied, precision-
manufactured MODULAR regulators are superior in their
ability to overcome dirt and sticky oil during opening
and tight closing. Models are available for nearly every
control function requirement of industrial ammonia and
commercial halocarbon refrigeration. These regulators
are ideal for cold storage plants, poultry plants, meat
packing, fish processing, freezers, ice plants, breweries,
bottling plants, heat recovery units, petrochemical
plants, pharmaceutical plants, supermarkets, and many
others.
APPLICATIONS
Evaporator Pressure Control
Defrost Pressure Control
Condensing Pressure Regulation
Receiver Pressure Control
Hot Gas Bypass Capacity Regulation
Suction Pressure Control
Air or Liquid Temperature Regulation
Internal System Pressure Relief
V-PORT
MODULATION
IRON BODY
DUCTILE
DIRT WIPING
DISC-PISTON
MANUAL OPENING
STEM
RELIABLE
TEFLON SEAT
MODULAR PI
LOTS
HERE
SPRING
STAINLESS STEEL
DUCTILE
STRONG
GAUGE PORT
1/4'' NPT
KEY FEATURES
Contents Page
Regulator Variations 3
Capacities 45
Control Modules (Pilots) 6
Main Regulators Only (AR1, AR3) 7
Operation and Adjustment 8–11
Installation Dimensions 12–13
Parts List 14–18
Service and Maintenance, Abbreviations 19
Ordering Information, Conversions 20
Specifications, Applications,
Service Instructions & Parts
HA4A MODULAR
PRESSURE REGULATORS
¾" THROUGH 6" PORT
(20MM THROUGH 150MM)
Bulletin R429d
AUG 2015
Various Connection
Styles and Sizes
for Refrigerants
HA4AB Regulator with Electric Wide Opening
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Hansen HA4AS Specifications

General IconGeneral
Number of Outputs4
Protection ClassIP20
Power Supply24V DC
Inputs4
Outputs4
CommunicationRS-485

Summary

Sizing

Installation

Control Modules (Pilots) for Any Regulator

Inlet Pressure

Opens as inlet pressure rises. Ranges available for various pressure settings.

Reseating Relief

Opens wide when pressure exceeds setting and repeatedly reseats after operation.

Outlet Pressure

Opens as outlet pressure drops. For hot gas bypass to suction or controlled supply.

Solenoid

Normally closed. Opens wide when energized. Requires coil.

Differential Pressure

Maintains set-for differential between inlet and outlet or other pressure source.

Electronically Controlled

Mounted electronic actuator changes pressure set point with controller and sensor.

Pneumatically Compensated

Air or other pressure in the bonnet raises inlet pressure on a 1:1 ratio.

Temperature Operated

Bulb opens the control module as temperature rise increases.

Main Regulators Only (AR1, AR3)

Operation of Regulators

HA4 AK Reseating Relief Regulator

HA4 AO Outlet Pressure Regulator

HA4 AB Regulator with Electric Wide Opening

HA4 AS Regulator with Electric Shut-Off

HA4 AD Dual Pressure Regulator

HA4 AP Pneumatically Compensated Regulator

HA4 AT Temperature Operated Regulator

HA4 AJ Electronically Controlled Regulator

HA4 AM Electric Motor Compensated Regulator

Operation

Motor receives signal from controller to alter pressure setting via cam and stem.

Installation Dimensions (mm)

Installation Dimensions (mm) 5 and 6 Regulators

Parts List Control Modules

Parts List 11;2 Through 4 (40 mm Through 100 mm)

Parts List 5 and 6 (125 mm and 150 mm)

Service and Maintenance

Failure to Open

Troubleshooting guide for regulators failing to open.

Failure to Close

Troubleshooting guide for regulators failing to close.

Ordering Information, HA4 A Modular Pressure Regulators

Caution

Important safety warnings and precautions for system use.

Warranty

Details on the product warranty against defects.

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