Cla-Val 100-43 - Manual

INSTALLATION / OPERATION / MAINTENANCE
Tubular Diaphragm Valve
100-43
MODEL
FLOW FLOW FLOW
• Low Head Loss
• Cast Steel Construction
• Fusion Coated Epoxy Inside and Out
• Anti-Cavitation Design
• Nickel Aluminum Bronze Construction Option (Alloy C95800)
• Duplex Stainless Steel Construction Option (Alloy 2205)
• Low Maintenance
• Simple and Reliable Operation
• 1-Year Warranty
The Cla-Val Model 100-43 Tubular Diaphragm Valve is a pressure-
operated, in-line axial valve. A tube diaphragm actuates the valve,
which is comprised of three major components: 1) Tube 2) Barrier and
3) Body. There is only one moving part in the valve — the tube
diaphragm. There are no shafts, packing, stem guides or springs.
The tube diaphragm is a one piece, homogeneous nitrile rubber part
which is extremely durable. The ends of the tube are thick solid rubber,
designed to fit between mating flanges. This design eliminates the pos-
sibility of cutting the tube diaphragm due to over tightening or piping
misalignment during installation.
The tube forms a drip tight seal around the barrier when the pressure is
equalized between the valve inlet and the control chamber. When
pressure is removed from the control chamber, the valve is open. The
minimum recommended operating pressure is 40 P.S.I. of inlet pressure.
Modulating Action
The valve tube diaphragm holds any inter-
mediate position when a quantity of water
is exhausted from the control chamber via
the pilot. The quantity of water in the con-
trol chamber is established by the “set
pressure” of the pilot.
The control chamber is filled or exhausted
to atmosphere, maintaining “set
pressure.”
Principle of Operation
Full Open Operation
The valve opens when pilot set
pressure is reached and pressure
in the control chamber is relieved.
Tight Closing Operation
Water pressure (equal to inlet pres-
sure) from valve inlet or from
upstream of valve is applied to the
control chamber. Valve closes bub-
ble tight.
Inlet Outlet
Inlet Outlet
Inlet Outlet