Cla-Val 100-30 - Manual

Powercheck Valve
• Built-in Automatic Check Valve
• Globe or Angle Pattern
• Drip-Tight, Positive Seating
• Threaded or Flanged Ends
• Packless Construction
The Cla-Val Model 100-30 Powercheck Valve is a
hydraulically operated diaphragm valve with a built-in check
feature to prevent return flow. Available in globe or angle
pattern, it consists of four major components: body,
intermediate chamber, diaphragm assembly, and cover. The
diaphragm assembly is the only moving part.
The diaphragm assembly is guided top, center and bottom by
a precision machined stem and utilizes a non-wicking
diaphragm of nylon fabric bonded with synthetic rubber. A
synthetic rubber disc retained on three and one half sides
forms a drip-tight seal with the renewable seat when pressure
is applied above the diaphragm. When pressure above the
diaphragm is relieved, the valve opens wide. The rate of
closing or opening can be controlled by modulating flow into
or out of the diaphragm chambers.
When a pressure reversal occurs, the valve will immediately
close, preventing reverse flow thru the valve. The split stem
will allow the disc retainer assembly to check closed
regardless of the position of the diaphragm.
Principle of Operation
100-30
Full Open Operation
When operating pressure below the
diaphragm is greater than the
pressure in the cover chamber, the
valve is held open, allowing full
flow.
Check Action
When a static condition or pressure
reversal occurs, the split stem
design allows the valve to instantly
check closed. Return flow is
prevented regardless
of the diaphragm's
position.
Tight Closing Operation
When pressure below the
diaphragm is relieved and operating
pressure is applied to the cover
chamber, the valve closes
drip-tight.
Four-Way Control Four-Way Control Four-Way Control
Note: For optimum operation of built-in check feature, installation with stem vertically up is recommended.
MODEL
(Full Internal Port)