017-07
Non-return valve

The non-return valve works like a check valve. However, the opening and closing rates can be adjusted independent from each other via throttle valves (3A) and (3B). Any return flow is prevented if the inlet pressure (P1) is equal to or lower than the outlet pressure (P2). The hydraulic interlock guarantees absolute tightness.

Minimum inlet pressure: 1 bar

For rating, please specify the following:
- Flow (med., max.)
- Inlet pressure (P1 side)
- Admissible pressure drop (normal: 0.2-0.5 bar)

Components:
1: main valve
2: ball valve (A, B)
3: throttle check valve (A, B )
4: check valve (A, B)
5: optical position indicator with vent plug (option: electric position indicator, opening limiter)
6: filter

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Material: Body parts: GJS-400, Hawle epoxy powder coated
Control line: stainless steel, brass
Diaphragms, gaskets: EPDM acc. to KTW-BWGL for water
Solenoid valve: brass, stainless steel
Max. operating Pressure: See table
Medium Water

The non-return valve works like a check valve. However, the opening and closing rates can be adjusted independent from each other via throttle valves (3A) and (3B). Any return flow is prevented if the inlet pressure (P1) is equal to or lower than the outlet pressure (P2). The hydraulic interlock guarantees absolute tightness.

Minimum inlet pressure: 1 bar

For rating, please specify the following:
- Flow (med., max.)
- Inlet pressure (P1 side)
- Admissible pressure drop (normal: 0.2-0.5 bar)

Components:
1: main valve
2: ball valve (A, B)
3: throttle check valve (A, B )
4: check valve (A, B)
5: optical position indicator with vent plug (option: electric position indicator, opening limiter)
6: filter

Contacts
Wish List
Order Nr.
*)
DN
Operating pressure max.
PN
L
Medium Weight Specification Basket
170700400
   IG 1 1/2" 16 bar 10/16 210 mm 10,00 kg
170700410
   IG 2" 16 bar 10/16 210 mm 10,00 kg
170704010
   40 16 bar 10/16 200 mm 18,00 kg
170705010
 1) 50 16 bar 10/16 230 mm 20,00 kg
170706510
   65 16 bar 10/16 290 mm 25,00 kg
170708010
 1) 80 16 bar 10/16 310 mm 32,00 kg
170710010
 1) 100 16 bar 10/16 350 mm 40,00 kg
170712510
   125 16 bar 10/16 400 mm 60,00 kg
170715010
 1) 150 16 bar 10/16 480 mm 65,00 kg
170720010
   200 10 bar 10 600 mm 118,00 kg
170720020
   200 16 bar 16 600 mm 118,00 kg
170725010
   250 10 bar 10 730 mm 254,00 kg
170725020
   250 16 bar 16 730 mm 254,00 kg
170730010
   300 10 bar 10 850 mm 358,00 kg
170730020
   300 16 bar 16 850 mm 358,00 kg
Wish List
1)
Also available as angled type, product numbers on request.

PN 25 on request (up to DN 200)

Article Nr.
Product description
019-00 Strainer, lateral cover
019-01 Strainer with angle seat