2
OPERATION
1. Prior to turning on supply air, back off adjusting screw until there is no compression of the range spring.
2. After applying the air supply, outlet pressure will be increased by rotating the adjustment screw clockwise. Pressure can be decreased
by turning counter clockwise.
3. Tighten locknut to maintain desired pressure setting.
MAINTENANCE
1. To remove condensate, from the Type-380, slowly open drain valve by turning clockwise and bleed accumulated liquid.
2. To clean filter element (Type-380)
a) Shut off supply pressure and relieve all internal pressure.
b) Drain condensate from drip well.
c) Remove four corner bolts from bottom of unit and remove drip well housing.
d) Remove filter retaining screw.
e) Remove filter retainer, filter o-ring seals and filter.
f)
Clean parts and reassemble in reverse order. Torque bolts to 250 in-lbs (28 N-m).
3. To clean/replace pintle assembly
a) Follow steps (a) through (d) above.
b) Unscrew collar and remove.
c) Remove pintle spring. The Type-390 does not contain a filter or collar. The pintle and pintle spring will be accessible upon
removal of base.
d) Clean or replace parts as required. Apply a high quality lubricant to all cleaned or replaced o-ring seals.
e) Reassemble in reverse order and torque bolts to 250 in-lbs (28 N-m).
4. To clean/replace diaphragm assembly
a) Back out the adjusting screw until the spring is no longer compressed.
b) Remove the four bonnet bolts and separate the bonnet from the body of the regulator. Remove the spring guide and spring.
c) Remove the diaphragm assembly, clean or replace it as necessary and reassemble in reverse order. After placing the
diaphragm assembly on the body, push down the assembly to make sure that the pintle is seated properly and strokes
smoothly.
d) Reassemble in reverse order and torque bolts to 250 in-lbs (28 N-m).
5. Repair kits/replacement parts
a) Repair kits include all parts marked with an asterisk (*).
b) Order kit as described in exploded view below
c) Shut off supply air. Back out adjusting screw
d) Remove four corner bolts from bottom of the unit and four bolts on top and remove all parts.
e) Replace all parts that show excessive wear. Apply a high quality lubricant to all cleaned or replaced o-ring seals.
f)
Clean all parts and replace in reverse order. Torque bolts to 250 in-lbs (28 N-m).
WARNING:
To avoid personal injury resulting from sudden release of pressure, isolate the regulator from all pressure before attempting
disassembly.
WARNING:
To avoid personal injury, property damage, or equipment damage caused by sudden release of pressure or explosion of
accumulated gas, do not attempt any maintenance or disassembly without first isolating the regulator from system pressure and relieving all
internal pressure from the regulator.
WARNING:
The materials of the Type-380/390 are compatible with natural gas. The user should be warned, however, that the Type-
380/390 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 pressure and temperatures can exceed those listed under
specifications.
