| The Bell &Gossett Circuit
Sentry‚ is a calibrated automatic flow limiting valve with a precision machined ball
type shutoff valve, and commissioning measurement ports. The valve is designed for flow
limiting-style balancing of both HVAC cooling and heating circuits; the valve is not for
use in potable water systems. The use of the flow cartridge facilitates easy flushing of
the piping upon commissioning the system. 
The integral automatic flow rate
cartridge maintains the flow rate in the controlled circuit. The optimum flow rate is
maintained at a constant level even under fluctuating pressure conditions from as little
as 2 PSI to as much as 60 PSI of differential pressure. In a properly designed system the
valve automatically ensures system balance, regardless of changing pressure conditions
normally associated with variable speed pumping. Integral P/T-ports for needle system
and/or drain are available as options, as are a variety of end connections on valves from
1/2" to 2 1/2" in size, with either female NPT or sweat fixed ends, and a union
end with sweat, female NPT or male NPT. Valves are normally equipped with 1" long
capped readout ports fitted with internal check valves.
· Keeps constant fluid flow, automatically compensating for
fluctuating pressure conditions
· Unique diaphragm pressure control element
allows one cartridge (flow cartridge) for most systems
· Large open flow paths for clog-free
operation
· Union connection allows for maximum
piping flexibility and elimination of unnecessary pipe fittings
· No requirement on pipe lengths before and
after the valve for easier application and piping
· Broad product size range (1/2" to
20")
Operating Data
Pressure Class Media ..........400
psi @250°F
Temperature Differential .......-4 ° to +250°F
Diff.Pressure Range ..........2
–60 PSID
Flow Range .................0.33 GPM
–180 GPM Per Cartridge |
