Caution
Warning
Installation and Start-Up
1. Remove the shipping plugs from both the regulator inlet and
outlet connections.
2. Make certain that the inside of the piping and the regulator
inlet and outlet connections are clean. The connections must
be free or dirt, pipe dope and other debris.
3. Use pipe joint material only on the male threads of the pipe
being connected to the regulator. Do not use pipe joint
material on the female threads of the regulator.
4. Install the regulator in the piping. Make certain that the gas
flow through the regulator is in the direction as indicated by
the arrow on the regulator body.
The regulator may be installed in any position: right side up,
upside down, vertical piping, diagonal piping, etc., If required
the diaphragm case may be rotated 360° in 90° increments.
IN-G-REG-1307-1212-02-A*
Model 496
Domestic Service Regulator Installation and Maintenance Instructions
To rotate the 496 diaphragm case, detach the diaphragm
case from the body by removing the two body-to-diaphragm
case screws. After repositioning the diaphragm case to
the desired position, reinstall the body-to-diaphragm case
screws. Ensure that the body-to-diaphragm screws are
sufficiently tightened to reseal the regulator. 35-50 ft-lbs.
of torque is recommended. The diaphragm case vent (
11
)
should be positioned to minimize the chances of moisture
collecting on the vent side of the diaphragm. The upper
diaphragm case (
4
) may be rotated to a downward position
by removing the flange screws (
10
).
The diaphragm case vent must be positioned to protect
against flooding, rain, ice formation, traffic, tampering, etc.
The vent must be protected against nest building animals,
bees, insects, etc. to prevent vent blockage and minimize the
chances for foreign material from collecting in the vent side
of the regulator diaphragm. If required, the upper diaphragm
case may be rotated by removing the upper-to-lower case
flange screws and rotating the upper diaphragm case to the
desired position. Reinstall the diaphragm flange screws and
tighten to hold the diaphragm case in position and reseal,
ensuring proper seal and verifying no leaks by using a soap
and water solution or other utility-approved method.
Do not overload the diaphragm with a sudden surge of inlet
pressure. Turn the gas on very slowly. If an outlet stop is
used, it should be opened first. Monitor the outlet pressure
during start-up to prevent an outlet pressure overload.
5. Turn the gas on very slowly.
6. Make certain that all connections are tight, ensure proper
seal and verify no leaks by using a soap and water solution
or other utility-approved method.
7. If necessary, adjust outlet pressure (set point) by removing
cap (
1
) and turning adjustment spring button (
2
). Turn
clockwise to increase and counter-clockwise to decrease
outlet pressure. Only adjust when gas is flowing through
regulator. Be sure to reinstall cap.
1
- Spring Cap
2
- Adjustment Ferrule
3
- Spring
4
- Upper Case
8
- Diaphragm Assembly
9
- Valve Stem
5
- Body
7
- Valve
6
- Orifice
10
- Flange Screws
11
- Vent
The Model 496 is a general purpose gas pressure
regulator for natural gas, air, CO
2
, propane, butane,
nitrogen, and other gases. It can be used for gas
service to homes, commercial establishments and
small industries as well as burners, unit heaters,
boilers, and other equipment. All regulators include
an internal relief valve.
Only qualified personnel should install or service a regulator.
Regulators should be installed, operated, and maintained
in accordance with applicable codes and regulations, and
Sensus instructions.
If the regulator vents fluid or a leak develops in the system,
it indicates that service is required. Failure to take the
regulator out of service immediately may create a hazardous
condition. Personal injury, equipment damage, or leakage
due to escaping fluid or bursting of pressure-containing
parts may result if this regulator is over pressured or is
installed where service conditions could exceed published
specification limits, or where conditions exceed any ratings
of the adjacent piping or piping connections.
To avoid such injury or damage, provide pressure-relieving
or pressure-limiting devices (as required by the appropriate
code, regulation, or standard) to prevent service conditions
from exceeding limits.
Additionally, physical damage to the regulator could result in
personal injury and property damage due to escaping fluid.
To avoid such injury and damage, install the regulator in a
safe location.
*This document replaces RM-1307-R2
