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GEMÜ butterfly valves

Butterfly valves in plastic and metal

  • Areas of application and industrial sectors
  • Valve type
  • Technical data

Butterfly valves: Areas of application and industrial sectors

GEMÜ butterfly valves are primarily used in industrial applications and the chemical industry, as well as the fields of water supply and water/waste water treatment. The concentric and single-eccentric designs are available as standard. However, the double-eccentric and triple-eccentric shut-off valves are also available for projects on request. Use of matched control components such as position indicators, positioners and process controllers allows GEMÜ butterfly valves to also be used in control circuits.

Butterfly valves: Valve type

The butterfly valve comprises a ring-shaped body in which a ring-shaped elastomer seat/liner is inserted. A washer guided through a shaft swings through a 90° rotary movement into the gasket. Depending on the version and nominal size, this enables operating pressures of up to 25 bar and temperatures up to 210 °C to be shut off. Most often, these valves are used for mechanically pure liquids, but can also be used in the right material combinations without posing any problems for slightly abrasive media or gases and vapours. 

Due to the large variety of materials, the butterfly valve is universally compatible, for example with countless industrial applications, water/drinking water treatment, coastal and offshore sectors. The butterfly valve is also often a cost effective alternative to other valve types, where there are no stringent requirements regarding switching cycles, hygiene or control accuracy. In large nominal sizes of greater than DN 150, it is often the only shut-off valve that is still viable. For more stringent demands with respect to chemical resistance or hygiene, there is the possibility of using a butterfly valve with a seat made of PTFE or TFM. In combination with a PFA encapsulated stainless steel disc, it is suitable for highly aggressive media in the chemical or semiconductor industry; and with a polished stainless steel disc, it can also be used in the foodstuff or pharmaceutical sector.

For all the valve types specified, GEMÜ offers numerous customized accessories for automation and process optimization. Electr. position indicator, position and process controllers, sensor systems and measurement devices, are easily and quickly fitted, adjusted and integrated in the existing process control technology. 

Butterfly valves: Technical data

OperationManual, pneumatic, motorized
ConnectionsUnion ends, threaded sockets, butt weld spigots
Operating pressure0 - 16 bar
Body materialsMetal: Aluminium, stainless steel, cast iron, brass, SG iron, cast steel
Plastic: PES, PP, PVC
Media temperatur-60 - 210 °C
Nominal sizesDN 15 - 1600
GEMÜ 410
410
Union end
Pneumatic
PVC-U
6 bar
60 ° C
DN 15 (1/2''); DN 20 (3/4''); DN 25 (1''); DN 32 (1 1/4''); DN 40 (1 1/2''); DN 50 (2'')
GEMÜ 411
411
Clamp; Spigot; Threaded socket
Manual
1.4408, investment casting; CW617N (brass)
10 bar
120 ° C
-20 ° C
DN 15 (1/2''); DN 20 (3/4''); DN 25 (1''); DN 32 (1 1/4''); DN 40 (1 1/2''); DN 50 (2'')
GEMÜ 415
415
Clamp; Spigot; Threaded socket
Pneumatic
1.4408, investment casting; CW617N (brass)
10 bar
160 ° C
-20 ° C
DN 15 (1/2''); DN 20 (3/4''); DN 25 (1''); DN 32 (1 1/4''); DN 40 (1 1/2''); DN 50 (2'')
GEMÜ 417
417
Union end
Manual
PVC-U
6 bar
60 ° C
DN 15 (1/2''); DN 20 (3/4''); DN 25 (1''); DN 32 (1 1/4''); DN 40 (1 1/2''); DN 50 (2'')
GEMÜ 423
423
Union end
Motorized
PVC-U
6 bar
60 ° C
DN 15 (1/2''); DN 20 (3/4''); DN 25 (1''); DN 32 (1 1/4''); DN 40 (1 1/2''); DN 50 (2'')
GEMÜ 428
428
Clamp; Spigot; Threaded socket
Motorized
1.4408, investment casting; CW617N (brass)
10 bar
120 ° C
-20 ° C
DN 15 (1/2''); DN 20 (3/4''); DN 25 (1''); DN 32 (1 1/4''); DN 40 (1 1/2''); DN 50 (2'')
GEMÜ 480
480
Flange
With bare shaft
EN-GJS-400-15
16 bar
150 ° C
-10 ° C
DN 25 (1''); DN 40 (1 1/2''); DN 50 (2''); DN 65 (2 1/2''); DN 80 (3''); DN 100 (4''); DN 125 (5''); DN 150 (6''); DN 200; DN 250; DN 300; DN 350; DN 400; DN 450; DN 500; DN 600
GEMÜ 481
481
Flange
Pneumatic
EN-GJS-400-15
16 bar
150 ° C
-10 ° C
DN 25 (1''); DN 40 (1 1/2''); DN 50 (2''); DN 65 (2 1/2''); DN 80 (3''); DN 100 (4''); DN 125 (5''); DN 150 (6''); DN 200; DN 250; DN 300; DN 350; DN 400; DN 450; DN 500; DN 600
GEMÜ 487
487
Flange
Manual
EN-GJS-400-15
16 bar
150 ° C
-10 ° C
DN 25 (1''); DN 40 (1 1/2''); DN 50 (2''); DN 65 (2 1/2''); DN 80 (3''); DN 100 (4''); DN 125 (5''); DN 150 (6''); DN 200; DN 250; DN 300; DN 350; DN 400; DN 450; DN 500; DN 600
GEMÜ 488
488
Flange
Motorized
EN-GJS-400-15
16 bar
150 ° C
-10 ° C
DN 25 (1''); DN 40 (1 1/2''); DN 50 (2''); DN 65 (2 1/2''); DN 80 (3''); DN 100 (4''); DN 125 (5''); DN 150 (6''); DN 200; DN 250; DN 300; DN 350
GEMÜ 490
490
Flange
With bare shaft
; 1.4301, stainless steel; EN-GJS-400-18-LT; S355J2G3 steel
10 bar
200 ° C
-20 ° C
DN 40 (1 1/2''); DN 50 (2''); DN 65 (2 1/2''); DN 80 (3''); DN 100 (4''); DN 125 (5''); DN 150 (6''); DN 200; DN 250; DN 300; DN 350; DN 400; DN 450; DN 500; DN 600; DN 700; DN 900; DN 1000
GEMÜ 491
491
Flange
Pneumatic
; 1.4301, stainless steel; EN-GJS-400-18-LT; S355J2G3 steel
10 bar
200 ° C
-20 ° C
DN 40 (1 1/2''); DN 50 (2''); DN 65 (2 1/2''); DN 80 (3''); DN 100 (4''); DN 125 (5''); DN 150 (6''); DN 200; DN 250; DN 300; DN 350; DN 400; DN 450; DN 500; DN 600
GEMÜ 497
497
Flange
Manual
; 1.4301, stainless steel; EN-GJS-400-18-LT; S355J2G3 steel
10 bar
200 ° C
-20 ° C
DN 40 (1 1/2''); DN 50 (2''); DN 65 (2 1/2''); DN 80 (3''); DN 100 (4''); DN 125 (5''); DN 150 (6''); DN 200; DN 250; DN 300; DN 350; DN 400; DN 450; DN 500; DN 600
GEMÜ 498
498
Flange
Motorized
; 1.4301, stainless steel; EN-GJS-400-18-LT; S355J2G3 steel
10 bar
200 ° C
-20 ° C
DN 40 (1 1/2''); DN 50 (2''); DN 65 (2 1/2''); DN 80 (3''); DN 100 (4''); DN 125 (5''); DN 150 (6''); DN 200; DN 250; DN 300
GEMÜ C480
C480
Flange
With bare shaft
EN-GJS-400-15
16 bar
70 ° C
-10 ° C
DN 700; DN 800; DN 900; DN 1000; DN 1100; DN 1200; DN 1300; DN 1400; DN 1600
GEMÜ C481
C481
Flange
Pneumatic
EN-GJS-400-15
16 bar
70 ° C
-10 ° C
DN 700; DN 800; DN 900; DN 1000; DN 1100; DN 1200; DN 1300; DN 1400; DN 1600
GEMÜ C487
C487
Flange
Manual
EN-GJS-400-15
16 bar
70 ° C
-10 ° C
DN 700; DN 800; DN 900; DN 1000; DN 1100; DN 1200; DN 1300; DN 1400; DN 1600
GEMÜ D450
D450
Flange
With bare shaft
PP (GF)
10 bar
90 ° C
5 ° C
DN 50 (2''); DN 65 (2 1/2''); DN 80 (3''); DN 100 (4''); DN 125 (5''); DN 150 (6''); DN 200; DN 250; DN 300
GEMÜ D451
D451
Flange
Pneumatic
PP (GF)
10 bar
90 ° C
5 ° C
DN 50 (2''); DN 65 (2 1/2''); DN 80 (3''); DN 100 (4''); DN 125 (5''); DN 150 (6''); DN 200; DN 250; DN 300
GEMÜ D457
D457
Flange
Manual
PP (GF)
10 bar
90 ° C
5 ° C
DN 50 (2''); DN 65 (2 1/2''); DN 80 (3''); DN 100 (4''); DN 125 (5''); DN 150 (6''); DN 200; DN 250; DN 300
GEMÜ D458
D458
Flange
Motorized
PP (GF)
10 bar
90 ° C
5 ° C
DN 50 (2''); DN 65 (2 1/2''); DN 80 (3''); DN 100 (4''); DN 125 (5''); DN 150 (6''); DN 200; DN 250; DN 300
GEMÜ D480
D480
Flange
With bare shaft
1.4408, cast stainless steel material; Cast steel (ASTM A216 WCB); EN-AC-4700, cast aluminium; EN-GJL-250; S275JR, steel
16 bar
210 ° C
-60 ° C
DN 25 (1''); DN 32 (1 1/4''); DN 40 (1 1/2''); DN 50 (2''); DN 65 (2 1/2''); DN 80 (3''); DN 100 (4''); DN 125 (5''); DN 150 (6''); DN 200; DN 250; DN 300; DN 350; DN 400; DN 450; DN 500; DN 600; DN 700; DN 800; DN 900; DN 1000; DN 1200; DN 1400; DN 1600
GEMÜ D481
D481
Flange
Pneumatic
1.4408, cast stainless steel material; Cast steel (ASTM A216 WCB); EN-AC-4700, cast aluminium; EN-GJL-250; S275JR, steel
16 bar
210 ° C
-60 ° C
DN 25 (1''); DN 32 (1 1/4''); DN 40 (1 1/2''); DN 50 (2''); DN 65 (2 1/2''); DN 80 (3''); DN 100 (4''); DN 125 (5''); DN 150 (6''); DN 200; DN 250; DN 300; DN 350; DN 400; DN 450; DN 500; DN 600
GEMÜ D487
D487
Flange
Manual
1.4408, cast stainless steel material; Cast steel (ASTM A216 WCB); EN-AC-4700, cast aluminium; EN-GJL-250; S275JR, steel
16 bar
210 ° C
-60 ° C
DN 25 (1''); DN 32 (1 1/4''); DN 40 (1 1/2''); DN 50 (2''); DN 65 (2 1/2''); DN 80 (3''); DN 100 (4''); DN 125 (5''); DN 150 (6''); DN 200; DN 250; DN 300; DN 350; DN 400; DN 450; DN 500; DN 600; DN 700; DN 800; DN 900; DN 1000; DN 1200; DN 1400; DN 1600
GEMÜ D488
D488
Flange
Motorized
1.4408, cast stainless steel material; Cast steel (ASTM A216 WCB); EN-AC-4700, cast aluminium; EN-GJL-250; S275JR, steel
16 bar
210 ° C
-60 ° C
DN 25 (1''); DN 32 (1 1/4''); DN 40 (1 1/2''); DN 50 (2''); DN 65 (2 1/2''); DN 80 (3''); DN 100 (4''); DN 125 (5''); DN 150 (6''); DN 200; DN 250; DN 300

Uranium removal and partial deionization at the Trollmühle Waterworks

GEMÜ butterfl y valves at the Trollmühle Waterworks - Uranium removal and partial deionization using Uranex® and Carix® procedures
Currently, the waterworks at the Trollmühle water supply authority in Windesheim near Bingen am Rhein supply approximately 43,000 people in 14,000 households with 2.2 million m³ drinking water per year. At peak times, this means a daily dispensing volume of up to 8500 m³.
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