Cla-Val 20-01/620-01 - Manual

20-01
MODEL
(Full Internal Port)
620-01
(Reduced Internal Port)
The blending valve shall be a pilot controlled hydraulically
operated diaphragm type globe valve with single seated
composition disc. It shall be operated by line pressure and
respond to commands from the pilot control. In a blending
system, the valve shall operate to maintain the flow rate of
one fluid in direct proportion to the flow rate of another fluid.
It shall maintain the same percent of one fluid to the other in
the blend regardless of variable system inlet pressures or
variable demands on the blend. It shall automatically adjust
the percent 01 one of the fluids in the blend, in response to
any setting of an adjustable restriction in the line being pro-
portioned.
3
2
2 1
S Y
F
IND. OPER.
PRESSURE
PORT "B"
PORT "A"
B
D
4
1
INLET OUTLET
A
Schematic Diagram
Item Description
1 Cla-Val 100-01 (Globe or Angle)
2 CDH2 Differential Control
3 CNA Needle Valve
4 X101 Position Indicator
Optional Features
Item Description
A X46 Flow Clean Strainer
B CK2 Shutoff Isolation Valve-Isolates Pilot System
F Omit Pilot Line To Inlet-Connects To
Independent Operating Pressure
Y X43 "Y" Strainer
The Cla-Val 20-01/620-01 Blending Valve is used in systems for con-
trolling the flow of one fluid in relation to another. It operates to maintain
a pre-set percentage of one fluid to the other regardless of fluctuating
demands on the blend.
The valve is a hydraulically operated, pilot controlled, diaphragm type.
It is operated by line pressure and responds to commands from the pilot
control. It maintains equal pressure at two sensing points, one in each
line of fluid being blended. With a restriction in each line between the
blending point and the sensing point, a flow rate in direct proportion to
the capacities of the restrictions will be maintained. By capacity adjust-
ment of one or both restrictions, the percentage of one fluid to the other
is adjusted. For sizes 1/2", 3/4", and 1" refer to Cla-Val 20-02.
Blending Valve for
Water Softening Systems
Purchase Specifications
Specifications
Size
End Details
Pressure Ratings
Temperature Range
Material
1-1/4” - 3” Threaded
1-1/2” - 8” Flanged
125 Class and 250 ANSI B16.1
125 Class - 175 psi Max.
250 Class - 300 psi Max.
Water: to 180º F. Max.
Petroleum Products: - 40º to180º F. Max.
Main valve body and cover:
Ductile Iron ASTM A 536
Main valve trim:
Bronze ASTM B61
303 or 316 Stainless Steel
Pilot control system:
Bronze ASTM B61 with
303 Stainless Steel trim and Monel
Other materials available:
Cast Steel, Bronze, Aluminum