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Circuit Sentry™ Automatic Flow Limiting Valves
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The Circuit Sentry
Difference:
• All flow must go through the cartridge orifice plate
giving complete and accurate control ±5%
• Unique rolling seal for accurate control, extended 2 – 60 PSID operating
range and quiet operation
• Large, open flow paths for clog-ffree operation
• Keeps fluid flow constant, automatically compensating for fluctuating system
pressures
• No requirement on pipe length before and after the valve, making application and
piping easier
• Get peak performance from HVAC systems with no adjustments required |
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The total system solution
You’ve been there before: an occupant has a space temperature complaint but the cause
may be complex and unknown within the hydronic system. The building manager quickly makes
an adjustment to the controls and solves the problem. But if that doesn’t work, he
may start to adjust the fluid flow into the affected area, not taking into account the
real cause of the problem or how this adjustment may affect the total system. The Circuit
Sentry, with its unique flow control cartridge, is the perfect solution for this type of
situation. Circuit Sentry is made of Dezincification Resistant (DDZR) Brass, and designed
for the flow limiting style of balancing both HVAC cooling and heating circuits.
Automated performance
The Circuit Sentry automatically helps ensure that all circuits receive their design flow.
This is achieved by selecting the correct overall flow, and limiting the flow into each
circuit so that one circuit will not take flow from others in the system.If the improper
flow is caused by a change in pump speed, two- or three-way valves, or because hydronic
balance was never achieved, the Circuit Sentry will work to provide the design flow when
installed. |
A rolling seal makes the
difference
All flow must go through the orifice plate entrance of the cartridge. Flow between the
moving piston and stationary body has been eliminated, so all flow is controlled. Any
velocity noise or valve chatter that could be caused by bypassing fluid is also
eliminated.
Thanks to the use of opposing forces, the cartridge never fully seats, leaving wide open
flow channels and preventing spring distortion found in other cartridges. This means that
at the design range of the cartridge, ports are wide open and the unit will pass solids up
to a 1/16 inch in diameter.
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| Engineered flow paths act as
pressure snubbers to stabilize pressure control. In conjunction with the EPDM rolling
seal, this snubbing effect controls the speed of piston movement, reducing wear on the
cartridge parts and eliminating any possibility for the piston to rapidly bottom-out,
causing a nuisance water-hammer-type noise. |
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APPLICATIONS:
For commercial applications.
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