4 | Baker Hughes
Copyright 2021 Baker Hughes Company. All rights reserved.
Installation
Personal injury, equipment damage, leakage or explo-
sion of accumulated gas or bursting of pressure con-
taining parts, may result if this valve/ regulator is over-
pressured, or is installed where service conditions
could exceed the limits given in the specification of
this manual, or on the nameplate, or where conditions
exceed any ratings of the adjacent piping or piping
connections. Verify the limitations of valve, regulator
and pipeline to ensure no device is overpressured.
To avoid such injury or damage, provide pressure
relieving or pressure limiting devices (as required by
the U.S. code of Federal Regulations, by the National
Fire Codes of the National Fire Protection Associa-
tion, or by other applicable codes), to prevent service
conditions from exceeding those limits. Additionally,
physical damage to the regulator or tubing can cause
personal injury and/or property damage due to explo-
sion of accumulated gas. To avoid injury and damage,
install the valve in a safe location.
Gas regulators installed in confined or enclosed
spaces should be provided with adequate ventilation
to prevent the possibility of gas buildup or accumula-
tion from leaks and venting. Leaks or vented gas may
accumulate causing personal injury, death, or prop-
erty damage. Regulator spring cases and the regulator
enclosure should be vented to a safe area away from
air intakes, or any hazardous location. The vent lines
and stacks must be protected against condensation
and plugging.
Note: For Series 21 regulators, lubricate the adjusting
screw with a light, nitrile rubber compatible grease
such as Lubriplate #105, or equivalent, at first oppor-
tunity, and thereafter, annually and during any interim
maintenance.
For Series 21 or 21H regulators (brass), inspect the clos-
ing cap for thread wear by verifying the torque required
to modify the set point is less than 6 ft-lbs (8.14 Nm) and
inspect for metal particles on the adjusting screw or on
the closing cap threads. This should be completed at the
first opportunity, and thereafter, annually and during any
interim maintenance.
The Series 21 regulator with Purple, Black, or White with a
Green Stripe have higher tendency to wear due to higher
spring pressure. Spring range (color) is indicated on the
spring range label located on the regulator.
If it is determined that closing cap thread wear has oc-
curred, it is recommended that the cap and adjusting
screw be replaced with a Closing Cap Assembly. For Clos-
ing Cap Assembly retro-fit kits, contact your local sales
representative for ordering information.
1. Personnel:
Installation of the Series 21 Regulator on any
valve should be made by qualified personnel familiar with
high-pressure piping and Regulators.
2. Prior Inspection:
Inspect the Regulator for any damage
that might have occurred in shipping.
3. Control Action:
Inspect to make sure the Body Insert
Assembly (Cartridge) is in the correct operational mode.
4. Orientation:
The Series 21 Regulator may be installed in any
position - the best position being one that provides easiest
access for regulator adjustment and valve maintenance.
Note: To avoid galling when stainless steel to stainless
steel connections are made, use a lubricant (such as
NEVER SEEZ
®
by Bostik). For best results Lightly
lubricate the female threads. Mixing the lubricant with
pipe dope is also acceptable. When tightening do not
exceed more than 1/4 turn past the point the threads
start to bind.
5. A Filter i
n the inlet line is recommended to remove dirt and
other particulates that could affect the variable orifice in
the regulator. Refer to the Type 30 Filter I/O/M manual for
installation instructions.
