Cla-Val 580 Series User Manual
Wafer & globe silent check valves, Series installation / operation / maintenance, Operation
WAFER & GLOBE SILENT CHECK VALVES
580 & 581
SERIES
INSTALLATION / OPERATION / MAINTENANCE
Note 1: flanged gasket
must bridge this joint
for pressure seal
Installed with name plate here
6
2
3
4
5
1
OPERATION:
Cla-Val Silent Check Valves operate automatically, to open...
when pump flow starts and close silently ...when pump flow
stops.
INSTALLATION:
Silent Check Valves, Wafer and Globe style must be
installed between flat faced iron or steel flanges per ANSI
B16.5 or Awwa 207, utilizing a full faced gasket to bridge the
joint between the seat O.D. (2) and the body (1) flange face.
In this manner a pressure seal at this joint is made (see
Note 1). Install the valve so that the nameplate data is plain-
ly read and the flow arrow points in the flow direction.
Detail
1
2
3
4
5
6
Description
Body
Seat*
Disc*
Spring*
Bushing*
Screw*
Material
Cast Iron
Bronze or SS
Bronze or SS
(Optional Buna-N
®
)
Stainless Steel
Bronze
Stainless Steel
(3” & larger valves)
* Recommended Spare Part Kit
Note 2: All size 2” and 2 1/2” valves have
threaded seats in liev of screws
FLOW OPEN
See
Note 2
SERIES 580
WAFER STYLE CHECK VALVE
2" THRU 10"
1
2
6
3
4
5
Series 581
Globe Style
Check Valve
2” thru 42”
MAINTENANCE:
Cla-Val Silent Check Valves are ruggedly designed for years of trouble-free
service. Therefore, regular maintenance is not required. However, during
initial start-up period the following problems may surface (due to mis-application)
that can be easily resolved:
A. No Flow thru Valve:
1. Observe that the flow arrow name plate, on the
valve body, is pointing in the direction of flow.
2. Check that the down stream shut-off valve is full open.
B. Valve Chatters:
1. Confirm that the flow velocity is a minimum 3’/Sec.
2. Check that there is a minimum of 3 diameters of
straight pipe installed up stream of the silent check valve.
C. Valve Leakage:
1. Confirm a full face gasket is installed per Note 1.
A
MAXIMUM ALLOWABLE INSIDE
DIAMETER OF FLANGE
(SEE NOTE NO. 1 )
VALVE SEAT
VALVE DISC
VALVE BODY
ANSI B16.5 COMPANION
FLANGE WITH FLAT FACE
MAXIMUM ALLOWABLE INSIDE
DIAMETER OF FLANGE
(SEE NOTE No. 1)
VALVE
SIZE
A
VALVE
SIZE
A
2
1
⁄2
2.940
14
14.140
3
3.570
16
16.160
4
4.570
18
18.180
5
5.660
20
20.200
6
6.720
24
24.250
8
8.720
30
30.250
10
10.880
36
36.250
12
12.880
42
42.250
STANDARD RING GASKET DIMENSIONS (SEE NOTE No. 2)
Valve
Size
I.D. For
125 Lb.
and
250 Lb.
Gasket
O.D. for
125 Lb.
Gasket
O.D. for
250 Lb.
Gasket
Valve
Size
I.D. For
125 Lb.
and
250 Lb.
Gasket
O.D. for
125 Lb.
Gasket
O.D. for
250 Lb.
Gasket
2
1
⁄
2
2.875
4.875
5.125
14
14.000
17.750
19.125
3
3.50
5.375
5.875
16
16.000
20.250
21.250
4
4,50
6.875
7.125
18
18.00
21.625
23.500
5
5.562
7.750
8.500
20
20.00
23.875
25.750
6
6.625
8.75
9.875
24
24.000
28.250
30.500
8
8.625
11.000
12.125
30
30.000
34.750
37.500
10
10.750
13.375
14.250
36
36.000
41.250
44.000
12
12.750
16.125
16.625
42
42.000
48.000
50.750
Note No. 1 - The mating companion flange I.D. must overlap the Valve seat.
This is required to achieve a seal between the seat O.D. and
The Body I.D. Interface area.
Silent Check Valve - Flanged or Wafer Style
(Flanged Style Shown)
Ring or Full Faxe Gasket
(1/16" Maximum Thickness)