Cla-Val 7100 Technical Manual - Manual (Page 3)

7100
Remote Control Valve
• Packless design--no lubrication
• Precisely engineered--close drip-tight
• Full line-sized opening--low flow resistance
• No internal or external orifice
• Diaphragm is fully supported for longer life
• Movable parts & seat ring replaceable without
removing valve from line
The Cla-Val Model 7100 Valve is a diaphragm actuated, hydraulically
operated valve designed for low original cost and long life. Its simple,
rugged construction allows it to perform dependably under the most
severe operating conditions. Its compact design makes it easy to install.
The 7100 Valve is ideal for any application where the need is for On-
Off control, the controlling medium of which is usually the liquid itself,
passing through a remote control. The control pressure, when applied
against the flexible diaphragm, produces a drip-tight seal between the
valve disc and its seat. In the open position, the diaphragm assembly
lifts to provide full flow.
The 7100 Valve provides all the advantages of an automatic control
valve at a cost comparable to manual valves of the same size and
quality.
Purchase Specification
Valve shall be full line size, diaphragm actuated. It shall be hydraulically
operated by employing the fluid flowing through it to open as well as
close the valve. The diaphragm shall be fabricated of nylon reinforced
synthetic rubber, and shall be fully supported in both the open and
closed positions and not be used as a disc or seating element. There
shall be no packing glands, internal orifice, or continuous bleeding.
The disc shall be synthetic rubber and have a cross section retained
on 31/2 sides. The disc shall close drip-tight against the valve seat.
The seat ring shall be replaceable and all necessary repairs shall be
possible without removing valve from the line. Valve shall be similar in
all respects to the Model 7100 Valve as manufactured by Cla-Val,
Newport Beach, California, or approved equal.
TM
TM
MODEL
Specifications
Sizes: 1-3 inch Threaded
2 and 3 inch Flanged
End Details: 125 ASA B16.1
Pressure Rating: 125 Class-175 psi Max.
Temperature Range: Water : 125°F Max.
Petroleum Products:
-40°F to 125°F Max
Material Specification
Main Body and Cover: Cast Iron ASTM A-48
Main Valve Trim: Delrin (DuPont 500) with
Bronze seat (ASTM B-61)
Spring: Stainless Steel AISI 302
Diaphragm and Disc: Buna-N ® Synthetic Rubber
Principle of Operation
VALVE OPEN
When pressure in diaphragm chamber is relieved to a zone
of lower pressure (usually atmosphere) the line pressure at
the valve seat opens the valve. VALVE CLOSED
When pressure from the valve inlet (or an equivalent inde-
pendent operating pressure) is applied to the diaphragm
chamber the valve closes drip-tight.