
8 Columbia Drive, Amherst, New Hampshire 03031 U.S.A.
Tel: (603) 886-9400 ♦ Fax: (603) 889-1844
www.controlair.com
441-622-100 rev. 10/21/10
Installation, Operation and
Maintenance Instructions
TYPE 330
Pressure Re
ulator
16
15
14
13
12
11
9
8
7
6
5
4
3
2
1
10
INTRODUCTION
These regulators are designed for air or gas service only. Maximum allowable inlet pressure
is 250 psi. Operating temperatures are 0 to 1600F. The Type-330 has low capacity internal
relief which provides very limited downstream over pressure protection. Note: Non-relieving
version does not provide internal relief. To avoid exceeding outlet pressure limits in service,
a pressure-relieving or pressure-limiting device should be provided.
INSTALLATION
Install the regulator as close as possible to the instrument or tool it is to service. For best
filter drainage orient the drain valve so that it is at the lowest point on the dripwell housing.
The words "IN" and "OUT" are cast into the body to indicate the direction of flow.
OPERATION
Prior to turning on supply air, back off adjusting screw until there is no compression of the
range spring. After turning supply pressure on, turn the adjusting screw clockwise to
increase outlet pressure.
MAINTENANCE
1) To remove condensate, slowly open drain valve and bleed accumulated liquid.
2) To clean filter element
a. Shut off supply air
b. Drain condensate
c. Remove four corner bolts from bottom of unit
d. Remove dripwell housing and filter
e. Clean parts and reassemble in reverse order
3) To install replacement parts
a. Order kit as described in exploded view below
b. Shut off supply air. Back out adjusting screw
c. Remove four corner bolts from bottom of the unit and four screws on top and remove
all parts.
d. Replace all parts that show excessive wear
e. Clean all parts and replace in reverse order
WARNING: The materials of the Type-330 are compatible with sweet natural gas. The
user should be warned, however, that the Type-330 regulator may vent some gas to the
atmosphere. In hazardous or flammable service, vented gas may accumulate and cause
personal injury, death, or property damage due to fire or explosion. If regulator is used
in a hazardous gas service area, the regulator must be vented to a remote, safe location
away from air intakes or any other hazardous area. The vent line or stack opening must
be protected against condensation or clogging. Do not use these products where
pressures and temperatures can exceed those listed under specifications.
Parts List
ITEM QTY DESCRIPTION
1 1 Adjusting Screw
2 1 Locknut
3 4 Bonnet Build Screw
4 1 Bonnet
5 1 Spring Guide
6 1 Range Spring
7 1 Diaphragm Assembly
8 1 Body
9 1 Pintle Assembly
10 1 Pintle Spring
11 1 Filte
12 1 Filter Retainer Assembly
13 1 Dripwell O-ring
14 1 Dripwell
15 4 Dripwell Build Screw
16 1 Drian Valve
LIMITED WARRANTY & DISCLAIMER
ControlAir, Inc. products are warranted to be free from defects in materials and workmanship for a
period of one year from the date of manufacture, provided said products are used according to
ControlAir, Inc. recommended usages. ControlAir, Inc.’s liability is limited to repair of, refund of
purchase price paid for, or replacement in kind of, at ControlAir, Inc.’s sole option, any products
proved defective. ControlAir, Inc. reserves the right to discontinue manufacture of any product or
change product materials, design or specifications without notice. Note: ControlAir does not
assume responsibility for the selection, use, or maintenance of any product. Responsibility for the
proper selection, use, and maintenance of any ControlAir product remains solely with the
purchaser and end user.
RepairKits:PartNo.
Relieving:449‐871‐100