Instruction manual

29
automatiC CHangeover regulators
Commercial Automatic Changeover Regulators
Designed for large capacity multi-cylinder or tank installations,
these regulators are used on applications such as bakeries,
motels, restaurants and grain dryers. The manifold portion
of the assembly consists of two 64 Series regulators and a
direct mounted 803 Series indicator. Temperature rating for the
Type 64SR-122 is -20 to 150°F / -29 to 66°C.
Type 64SR-122 – For high pressure (pounds-to-pounds) service
with the outlet pressure supplied by a Type 64SR that has internal
relief protection.
Commercial Automatic Changeover Regulators
TYPE NUMBER
CAPACITIES IN
BTU per hour / SCMH
PROPANE
(1)
INLET
CONNECTION,
INCH
OUTLET
CONNECTION,
INCH
OUTLET PRESSURE
SETTING, psig / bar
OUTLET ADJUSTMENT
RANGE, psig / bar
64SR-122 1,210,000 / 13.6 1/2 FNPT 1/2 FNPT 10 / 0.69 5 to 20 / 0.34 to 1.4
TYPE 64SR-122
Changeover Manifold Assemblies
Type R130-21 – Composed of two Type 67C regulators and a
special 0 to 60 psig / 0 to 4.1 bar pressure gauge, the Type R130
delivers a 45 psig / 3.1 bar outlet pressure on supply and 30 psig /
2.1 bar on reserve. The gauge, which serves as the changeover
indicator, is painted red from 0 to 35 psig / 0 to 2.4 bar. When the
dial reads in the 0 to 35 psig / 0 to 2.4 bar range, it indicates that the
manifold has switched from the supply to the reserve cylinder. The
Type R130-21 has a temperature rating of -20 to 160°F / -29
to 71°C.
Type 749B-21 – Large capacity changeover manifold for commercial
and industrial applications. It consists of two 64 Series regulators
and a 803 Series direct indicator. The assembly is used primarily
in conjunction with either a Type HSRL or 64SR regulator. The
standard outlet setting is 15 psig / 1.0 bar from the supply and
5 psig / 0.34 bar from the reserve. Temperature rating for the
Type 749B-21 is -20 to 150°F / -29 to 66°C.
Note: These units are intended for use with Second-Stage
regulators and/or separate relief devices which provide
overpressure protection required by NFPA 58. Capacity of
all these changeover manifolds is dependent on the size of
the Second-Stage regulator with which they are used. If the
manifolds are used as a Final-Stage (pounds-to-pounds), a
relief valve is required in the downstream system.
Changeover Manifold Regulators
TYPE NUMBER
CAPACITIES IN
BTU per hour / SCMH
PROPANE
(1)
INLET
CONNECTION,
INCH
OUTLET
CONNECTION,
INCH
OUTLET PRESSURE SETTING
Supply Setting,
psig / bar
Reserve Setting,
psig / bar
R130-21 1,475,000 / 16.6 1/4 FNPT 1/4 FNPT 45 / 3.1 30 / 2.1
749B-21 1,500,000 / 16.9 1/2 FNPT 1/2 FNPT 15 / 1.0 5 / 0.34
1. Based on 100 psig / 6.9 bar inlet, reserve setting.
Remote Indicator
803 Series – give remote visual indication that the supply cylinder
is empty and that the regulator is withdrawing gas from the reserve
cylinder. The indicator has 360° visibility and is weatherproof.
Type 803-21 – Indicator only
TYPE R130-21
TYPE 749B-21
TYPE R130-21
TYPE 749B-21
TYPE 803-21