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Vacuum Valves > Water Valves & Accessories

Water Flow Indicators & Switches

Indicators

We recommend installing a visual flow indicator on every water circuit to give the operator confirmation, usually by a spinning rotor, that water is flowing.

Use flow indicators without switches when an interrupted supply will not cause damage or when the component has its own coolant alarm. For water-cooled components critical to the vacuum (diffusion pump, turbo pump) or those possibly damaged by flow failure (e-beam source, sputter gun), use a water switch with the indicator. Switch should connect to an alarm or process “kill” button.

Switches

In a flow switch, a rotating magnet induces a current in an external coil. The current is sensed and compared to a variable set-point value. If the water flow decreases to a value below the set-point, a relay is de-energized. This arrangement ensures that a stuck rotor carrying the magnet cannot give a false positive flow indication.

Specifications Table

Temperature (°C) 90°C
Pressure Rating (psi) 100
Power 115, 50/60 (VAC, Hz)
Pressure Drop Normal Models: 3" long pipe (same I.D.)
Low Flow Models: 6 psi drop (1 gpm)
Relay
(115 VAC or 28 VDC)
#replay#

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Ordering Table

(Click column headers to sort data)

Description Type Termination Flow gpm Body Face Plate Manual PartNo Price Add Item
VacuCADSM
Description Type Termination Flow gpm Body Face Plate Manual PartNo Price Add Item
VacuCADSM
Water Flow Switch FFS Series 1/4" Female NPT 0.1—1.0 Brass (Polysulphone)
--
FFS-100B
P.O.R.
N/A
Water Flow Switch FFS Series 1/4" Female NPT 0.1—6.0 Celcon (Polysulphone)
--
FFS-100C
P.O.R.
N/A
Water Flow Switch FFS Series 1/2" Female NPT 1.5—12 Brass (Polysulphone)
--
FFS-150B
P.O.R.
N/A
Water Flow Switch FFS Series 1/2" Female NPT 1.5—12 Celcon (Polysulphone)
--
FFS-150C
$306.00
N/A
Water Flow Switch FFS Series 1/2" Female NPT 4.0—20 Brass (Polysulphone)
--
FFS-155B
P.O.R.
N/A
Water Flow Switch FFS Series 1/2" Female NPT 4.0—20 Celcon (Polysulphone)
--
FFS-155C
P.O.R.
N/A
Water Flow Switch FFS Series 3/4" Female NPT 6—30 Brass (Polysulphone)
--
FFS-160B
P.O.R.
N/A
Water Flow Indicator SFI Series 1/4" Female NPT 0.1—6.0 Celcon (Polysulphone)
--
SFI-10C
$65.00
N/A
Water Flow Indicator SFI Series 1/4" Female NPT 1.5—12 Celcon (Polysulphone)
--
SFI-15C
P.O.R.
N/A

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