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Spring Loaded
Actaris / Schlumberger Spring Loaded Service
Regulators are simple direct acting regulators designed for accuracy, safety and
dependability. Spring loaded service regulators are used primarily for final
stage lower outlet pressure applications (Inches W.C. to 2 or 5 psig). Typical
applications include residential and low outlet pressure commercial and
industrial gas supply, and all types of gas-fired equipment including furnaces,
boilers, dryers, ovens, heaters, etc. Spring loaded regulators provide
extremely fast response to changing downstream flow conditions. Unique features
of Actaris / Schlumberger spring loaded service regulators include:
- Controlled Boost
All regulators are equipped with boosting devices (B42: raised lip on
valve seat, all others: adjustable loading ring) to offset pressure droop at
high flows caused by spring and diaphragm effect.
- Controlled Breather Opening
All regulators are equipped with a soft seat vent valve to ensure proper
breathing and stability under all conditions
- High Capacity Internal Relief
All spring loaded regulars are equipped with internal relief as standard.
Relief flow paths are as large as practical to provide the least resistance
to venting gas in the event of an over pressure situation, thus minimizing
pressure build-up
| Spring Loaded Principle of Operation
Inlet pressure is reduced to a lower outlet pressure by restricting flow
through an orifice to match a fluctuating downstream demand.
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- As downstream demand increases, outlet pressure drops slightly, and the
diaphragm moves downward. The valve seat moves farther away from the orifice
face to allow flow to increase to match the increased demand.
- As downstream demand decreases, outlet pressure increases slightly,
moving the diaphragm upward. The valve seat moves closer to the orifice face
to restrict flow to match the decreased demand.
- When demand is shut off, outlet pressure continues to rise, moving the
diaphragm up farther. The valve seat is driven into the orifice face,
shutting off the flow of gas bubble-tight (lockup).
B42 Series
The B42 service regulator incorporates a molded diaphragm and increased
lever ratio into a conventionally designed regulator. The result is a
lighter, more compact unit that provides the power, capacity, and relief
performance of much larger regulators. Reduced weight means easier handling
and installation. Reduced size means easier installation in limited spaces
and a lower profile meter set. Typical applications include residential
services, 2 psig systems, and small commercial services |
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B31 Series
The B31 service regulator is a high-performance regulator with a large
effective diaphragm area and powerful lever ratio. The B31 is designed to
maintain accurate regulation over a wide range of flows on systems with
extreme variations in inlet pressure and to deliver high capacities with
very low inlet pressures. Typical applications include demanding residential
services and light commercial services.
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B34S Series
The B34S service regulator is a compact, cost-effective regulator designed
for midrange commercial applications. The B34S is particularly well-suited
for quick on/off applications where shock problems can occur.
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