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www.mirab-valves.com
Manufacturer of Industrial Valvesa n d R e l e v a n t E q u i p m e n t
Tilting Disk Check Valves
with Counter Weight
Tilting Disk Check Valveswith Counter Weight
3
Tilting-Disc Check Valves with Counter Weight
Size: DN 100 - 1800 mm
Pressure: PN 10- 40 bar
Face to face: DIN EN 558-1 series 14 (DIN3202-F4)
Flanges: DIN EN 1092-2 (DIN 2501)
Product features:
Eccentric disc operation, Body seat ring made of corrosion resistant steel, Disc seat ring is corrosion resistant
steel with seal for reliable sealing, Possibility for installation of weight and lever on both sides. Low weight for
short length of the valves , Maintenance free , Rugged body with disc suitable for fluid flow Disc and shaft are
connected by key , Seat ring rolled into the body.
Product features:
This types of valve is used in water supply installations to stop the fluid flow in the opposite direction. The valve
closing speed can be adjusted by changing the weight position along the lever. All of the seals of the valve
bearing can easily be replaced. The standard seal material is NBR for up to 70°C (for gas up to100°C). For
higher temperature and other fluids suitable seal material is available on request.
Corrosion protection:
Body and disc are fully coated with blue electrostatic powder coating with minimum 250 micron thickness.
Application:
Suitable for fluids such as water & waste water up to 70°C & gas up to 100°C.
Nominal PressurePN (bar)
Test Pressure
10
16
25
40
Shell Test
17
25
38
60
Closure Test
11
18
28
44
Hydrostatic test Pressure (bar) according to DIN EN 12266-1
Design:
Reliable design.
Disc & shaft connection by key.
Bended stainless steel body seat ring.
Low weight as short pattern.
Possibility for installation of weight and lever on both sides.
Maintenance free.
Rugged body with disc suitable for fluid flow.
Eccentric disc operation.
Disc seat ring is corrosion resistant with O-ring included.
MB-0717
1611
06
26
27
07
29
22
03
01
34
04
28
30
4
Part List
33
32
31
17
18
19
20
25
2423
12
14 0915 1013 0811
Tilting Disk Check Valveswith Counter Weight
MB-0717
Tilting Disk Check Valveswith Counter Weight
5
Body Seating Surface
Optional Design #1
Welded Directlyonto the Body
Optional Design #2
Welded Directlyonto the Body
Normal Design
Separate Seat RingPressed into the Body
02
21
05
Body
Body Seating Surface
Bearing Bush
Disk
Disk Seat
Shaft, Lever End
Shaft, Free End
Shaft Sealing
O-ring
O-ring
Spacer Ring
Bearing Cover
O-ring
Washer
Hexagonal Bolt
Cap
Internal Key
Key Retainer
Hexagonal Bolt
Counter Socket Screw
O-ring
Lever
Key
Spacer Ring
Cir clips
Limit Stop
Socket Screw
Counter weight
Socket Screw
Socket Screw
Hexagonal Bolt
Washer
Nut
rubber
EN 1563/ EN-GJS-400-15٭
18Cr- 8Ni
ASTM B148 UNS 95200
EN 1563/ EN-GJS-400-15٭
DIN EN 10088-3/ 1.4021
DIN EN 10088-3/ 1.4021
DIN EN 10088-3/ 1.4301
BRASS
EN 1563/ EN-GJS-400-15٭
EN 1563/ EN-GJS-400-15٭
DIN EN 10088-3/ 1.4057
DIN EN 10088-3/ 1.4301
ISO 3506-1, Gr. A2, Property Class 70
ISO 3506-1, Gr. A2, Property Class 70
ST-37
High Strength Carbon Steel-St 60
BRASS
EN 1563/ EN-GJS-400-15
ISO 3506-1, Gr. A2, Property Class 70
EN 1563/ EN-GJS-400-15
EPDM / NBR
DIN EN 10088-3/ 1.4301
DIN ISO 898-2, Property Class 8, Zinc Plated
NBR (EPDM on Request)
NBR (EPDM on Request)
NBR (EPDM on Request)
NBR (EPDM on Request)
DIN ISO 898-1, Property Class 8.8, Zinc Plated
Steel (FST)
DIN ISO 898-1, Property Class 8.8, Zinc Plated
DIN ISO 898-1, Property Class 8.8, Zinc Plated
DIN ISO 898-1, Property Class 8.8, Zinc Plated
ISO 898-2, Property Class 8, Zinc Plated
ISO 898-2, Property Class 8, Zinc Plated
01
02
03
04
05
06
07
08
09
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
1 2Part No. Part Name Part Material
(1) Recommended spare parts(2)Parts subjected to wear
EN-GJS-500-7 available on request. ٭
MB-0717
6
Dimensions & Weight of Tilting-Disc Check Valve
L b n
DIN EN 1092 - 2 (DIN 2501)
DIN EN 558 - 1 series 14 (DIN 3202 - F4)
PN
25
PN
16
PN
10
150100
200
150100
150100
250
200
200
300
250
250
350
300
300
400
350
350
500
400
400
600
500
500
700
600
600
800
700
700
900
800
800
1000
900
900
1000
100012001400150016001800
210190
210190
230
230
250
250
270
270
290
290
310
310
350
350
390
390
430
430
470
470
510
510
550
210190
230250270290310
350390430470510550
550630710750790870
300235
360
285220
285220
425
340
340
485
400
400
555
455
455
620
520
505
730
580
565
845
715
670
960
840
780
1085
910
895
1185
1025
1015
1320
1125
1115
1255
123014551675178519152115
2019
22
1919
1919
24.5
20
20
27.5
22
22
30
24.5
24.5
32
26.5
24.5
36.5
28
24.5
42
31.5
26.5
46.5
36
30
51
39.5
32.5
55.5
43
35
60
46.5
37.5
50
404546
47.54952
2823
28
2319
2319
31
23
23
31
28
23
34
28
23
37
28
23
37
31
28
41
34
28
44
37
31
50
37
31
50
41
34
57
41
34
44
374144445050
88 166
2002442953433864254544905546167147758279591129126913261470
12
88 166
2002442953433864254454905546167147758279591129126913261470
88
12
12
8
16
12
12
16
12
12
16
16
16
20
16
16
20
20
20
24
20
20
24
24
24
28
24
24
28
28
28
28
283236364044
1662002442953433864254544905546167147758279591129126913261470
370430
295
295
310
240180
240180
250190
660
525
515
550
470
460
490
410
400
355
350
875
770
725
770
650
620450 330 615 25.5 28 20565
450 330 640 30 31 20585
450 330 670 34.5 37 20600
1210
1050
1050
1170
116013801590170018202020
12001400150016001800
630710750790870
14851685182019302130
5760
62.56570
5050575757
3236364044
13901590171018202020
12001400
16001800
630710
790870
15301755
19752195
6974
8188
5762
6270
3236
4044
14201640
18602070
1090
950
950
990
840
840
mm mm mm mm mm mm mmDN e1
1361802172572983323684074445175986817528259871142120812971460136180217257298339375420466547605686757837
10021147122613001468
17375274
120150167209246435555758
1026126018702742328839195210
144187227270311357395435474550630716787870
10251185124813221477
18385681
1511672012312664576238551140141020523030358042495658
8914414013717520523426729334640542740539048758959357356489
144140137175205234267293346405427405390487589593573564
89144140137175205234267293346405427405390487589593573564
230150
230150
230150
230
230
230
250
250
250
300
300
300
350
350
350
400
400
400
500
500
500
600
600
600
700
700
700
800
800
800
800
800
800
80010001200120012001250
800
800
-- 135
21422624130135239445750059069576378580098711791205122213041352142262413013523944575005906957637858009871179120512221304
1352142262413013523944575005906957637858009871179120512221304
150100
150100
150100
160
160
160
180
180
180
200
200
200
225
225
225
250
250
250
300
300
300
330
330
330
390
390
390
450
450
450
550
550
550
600685800780820
1000
600
600
17375274
105144155191226383525722980118017462608308237134974
450 275
450 275
450 275
10001200120012001250
685800780820
1000
10001200120012001250
685800780820
1000
mm mm mm mm mm mm mm Kge4e3e2 ah3h2h1 Wgt.
--
19.4446994115142165215261312364406506605646695810
--
--
-
-
-
-
-
-
-
-
-
-
-
--
-
--
--
--
-
-
-
-
-
2.5
2.5
2.5
13
13
13
25
25
25
34
34
34
--
19.4446994115142165215261312364406506605646695810
3751.566.579111
3751.566.579111
3751.566.579111
--
19.4446994115142165215261312364406506605646695810
1500 750 1865 77.5 62 361750
Dimensions for working pressure 40 bars and higher as per request
Tilting Disk Check Valveswith Counter Weight
MB-0717
7
Installation of Tilting-Disc Check Valves with Counter Weight
Tilting Disk Check Valveswith Counter Weight
MB-0717
Horizontal pipeline:
Pos. 1
Counter weight and lever on
the right hand side of the
valve in flow direction
Pos. 2
Counter weight and lever on
the left hand side of the valve
in flow direction.
Vertical pipeline with flow direction upward:
Vertical pipeline with flow direction downward:
Note:
Normally the lever and counter weight of all non-return valves with counter weight are assembled as shown in
Pos.2. (Horizontal line) For other valve positions, the lever should be assembled according to the valve positions
as shown in the above figures.
Pos. 3
Pos. 5
Pos. 4
Pos. 6
8 MB-0717
Conditions for installation of flanged type Butterfly valve next to Tilting-DiscCheck Valve with Counter Weight and Lever
For installation of non-return valve adjacent to a butterfly valve, the weight lever of the Tilting-Disc Check Valve
must be on the left hand side in flow direction and the gearbox of the butterfly valve on the right hand side to
prevent collision of the weight lever with the gearbox of the butterfly valve.
Tilting disc Non-return
valve With counter weight
Spacer pipe Flanged type
Butterfly valve
150
200
100
250
300
350
400
450
500
600
700
800
900
1200
1000
1400
1600
1800
210 —
—
—
—
—
—
— —
— —
—
—
—
—
—
—
230
190
23
250 44
270 69 2
290 94 25
310
330
115
143
40
58
350 165 65
390 225 95
430 272 12025
470 315 15013
510 380 18025
630
710
790
870
550
—
—
150
150
150
200
225
280
300
400
500
600
650
750
900
1100
1300
1400
423
515
615
705
815
210
280
340
455
455
34
62
80
90
110
DNL
mmL1
mma
mmb
mmc
mm
Tilting Disk Check Valveswith Counter Weight
Tilting Disk Check Valveswith Counter Weight
9
Tilting-Disc Check Valves with Hydraulic Damping System
MB-0717
Mirab Tilting-Disc check valves with counter weight can be equipped with hydraulic damping system for adjusting
the closing time. With the damping system the opening and closing time can be reduced, and the water hammer
effect can be prevented by reducing the damping time.
Application: To provide non-slam performance in places where water return through the valve is permitted.
A flow control valve can adjust the opening and closing speed of check valve disc.
Application examples:
Water supply line with pumps installed in parallel
When the pump is turned off and the flow direction
reversed, the valve closes, and if the valve does
not have a damping mechanism, the resultant
force could damage the system. In this case, the
reverse pressure would be equal to the pump
pressure.
Water supply line with long pipe and high elevation
Pumping to high elevation.
Quick change in flow direction which results in
extensive force. In this situation the amount of
reverse pressure on the closed disk is caused by
the amount of water column.
Tilting Disk Check Valveswith Counter Weight
10
Selection of Tilting-Disc Check Valves with Hydraulic Damping System
Order for Tilting-Disc check valve with damping device should contain back (or differential) pressure.
If the standard types are equipped with hydraulic damping device on one side, due to shaft dimensioning and
material, the maximum admissible back pressure is limited according to the table below:
If the Tilting-Disc Check Valve is equipped with damping device on both sides, the maximum admissible back
pressure will be doubled in the above table.
Types for higher back pressure upon request.
Illustration of tilting disc with counter weight of DN 400 and PN 10 installed in horizontal position.
Due to geometrical similarity, this graph could also be used for other valve sizes.
150 200 250 300 350 400 450 500 600 700 800 900 1000 1200
1400
to
1800
12.5 14.5 7.1 8.5 5.4 3.6 4.6 3.3 3.2 3.1 2.9 2.9 2.9 2.6 2
DN
[mm]
Maximum
admissible
back pressure
[bar]
pre
ssure
loss
ΔP
(m
m W
C)
openin
g d
egre
e φ
Fluid speed (m/s)
--- Pressure loss when the valve is fully open
MB-0717
Tilting Disk Check Valveswith Counter Weight
11
Tilting-Disc Check Valves with Hydraulic Damping System Type 1
This design of Tilting-Disc check valve with damping system produce in Mirab valve as routine product.this
valve's function is very smooth & easy. Damping system works while closing & The closing time is adjustable
by move the weights on lever, also the cylinder orifice is exchangeable.
MB-0717
Tilting Disk Check Valveswith Counter Weight
12
Damping system installation on body, Type 1
MB-0717
Pos. 2
The damping system & the weight are
located on right side of flow
Pos. 1
The damping system & the weight are
located on left side of flow
Pos. 4
The damping system & the weight are
located on right side of flow
Pos. 3
The damping system & the weight are
located on left side of flow
Pos. 6
The damping system & the weight are
located on right side of flow
Pos. 5
The damping system & the weight are
located on left side of flow
Tilting Disk Check Valveswith Counter Weight
13
Mechanism and operation of Tilting-disc Check Valve with Damping Cylinder, Type 2
This type of Tilting-Disc check valve with damping system are manufactured based on request. Damping system
works in this type in open or close position. Damping system is equipped with hydraulic flow control valve which
can adjust the close or open time of easily.
Tilting-Disc Check valve in 50%
open position
Tilting-Disc Check valve in
damped open position
Tilting-Disc Check valve in
damped closed position
trave
l
dam
ped
opening zone dam
ped
clos
ed
Closed
Closing time can be adjusted to 30-seconds max. as standard, by a flow control valve.
Open
Open
Closed
Check valveFlow control valve
damped
MB-0717
Tilting Disk Check Valveswith Counter Weight
14
Positions of Hydraulic Cylinder on Tilting-Disc Check Valve, Type 2
MB-0717
Horizontal pipeline:
Pos. 1
Weight and damping on
the left side of the valve
in flow direction
Pos. 2
Weight and damping on
the right side of the
valve in flow direction
Pos. 3
Weight and damping on
both sides of the valve
Vertical pipeline with flow direction upward
Pos. 6
Weight and damping on
both side of the valve
Vertical pipeline with flow direction downward:
Pos. 9
Weight and damping on
both sides of the valve
Please indicate position of damping system in your order.
Note: Normally ,Mirab products are made according to the horizontal lines.
Pos. 7
Weight and damping on the left
side of the valve in flow direction
Pos. 4
Weight and damping on the left
side of the valve in flow direction
Pos.8
Weight and damping on the right
side of the valve in flow direction
Pos.5
Weight and damping on the right
side of the valve in flow direction
Tilting Disk Check Valveswith Counter Weight
15
Damping time adjustment
The valve opening and closing speed can be adjusted by damping time at the flow control valve
Dam
pin
g T
ime [
s]
Valve adjustment [Turns]
If the Tilting-Disc Check Valve is equipped with mounted oleo hydraulic damping device on both sides, the flow
control valve of both oleo hydraulic damping devices must be adjusted at the same time.
CAUTION
MB-0717Mirab can change the dimensions without any notice.We are not responsible for any error in printing.
info@mirab-valves.com
MIRAB Co' PRODUCTS
Butterfly Valves Family: Double Flanged Type, Short body,
Wafer Type, Lug Type ,Sea Water Type, Counter Weight &
Hydraulic Actuated Type.
Gate Valves Family: Soft-Sealing Gate Valve, Metal Seat
Gate Valve, Knife Gate Valve, Penstock Sluice Gate Valve.
Non Return Valves Family: Tilting Disc, Swing Check Valve,
Silent Check Valve, Foot Valve, Nozzle Check Valve, Flap Valve.
Air Vent Family:Single Chamber-Double Orifices Triple Function
Air Valve, Double Chambers-Double Orifices Triple Function
Air Valve, Triple Function Air Sewage Valves Single-Chamber
type, Large-Orifice Air Valve.
Control Valves Family: Automatic Control Valves, Needle
Valve, Globe Valve, Fixed Cone Free Discharge Valve, Hollow
Jet Valve, Sleeve Valve.
Hydrant Valves Family: Dry Fire Hydrant Valves (Standing &
Pit Type), Wet Barrel Fire Fighting Valve, Post Indicator Valve.
Strainers Family: Y Type, T Type, One Side Flanged Type.
Fittings Family: Dismantling Joint F1&F2, Flange, Pipe Coupling.
Accessories.
Actuators.
Recommended