Buttefly valve - UNIWAT Fig. VF700 | Comeval | Philippopoulos s.a.
Buttefly valve - UNIWAT Fig. VF700 | Comeval | Philippopoulos s.a.

Buttefly valve - UNIWAT Fig. VF700 | Comeval

Comeval UNIWAT VF700 Wafer Butterfly Valve

The Comeval UNIWAT VF700 is a concentric wafer-type butterfly valve with a soft seat, designed for bidirectional flow and primarily used for isolation. It can be used for limited throttling but does not replace a control valve for continuous flow regulation. Suitable for HVAC, water supply, process water, air, gases, and lubricant circuits.

Standards and Operating Limits

  • DN25–DN1200, depending on configuration.
  • Design: EN 593.
  • Face-to-face: EN 558 Series 20 / DIN 3202 K1.
  • Connection: wafer between flanges EN 1092 PN10/PN16 and ASME B16.5 Class 150.
  • Pressure: PN16 for DN25–DN300, PN10 for DN350–DN600; for PTFE seat PN10.
  • Pressure test: EN 12266-1.
  • Seat leakage: Rate A.
  • Top flange: ISO 5211 for automation.

Materials and Sealing

Available with body in EN-JL1040 cast iron, EN-JS1030 ductile iron, CF8M stainless steel, or WCB steel. Disc options include ductile iron nickel plated, CF8M, aluminum bronze, and 904L. Seats available in NBR, EPDM, Viton, Silicone, PTFE, and Hypalon, selected based on media, temperature, and chemical compatibility.

Indicative temperature limits for liners:

  • NBR: up to 80 °C.
  • EPDM: up to 110 °C, with short peak 130 °C.
  • Viton: up to 150 °C, with short peak 180 °C.
  • Silicone: up to 170 °C, with short peak 190 °C.
  • PTFE: up to 110 °C, with short peak 120 °C.

Handling and Automation

The VF700 can be delivered with a hand lever, gearbox, pneumatic, or electric actuator. Actuator selection depends on DN, differential pressure, seat material, and required operating torque.

Certifications

Includes PED 2014/68/EU, WRAS, EAC, and ATEX Declaration of Conformity, depending on version and size.

FAQ

When to choose EPDM?
For water, HVAC, and neutral fluids without hydrocarbons.

When is PTFE seat required?
For chemicals or fluids where elastomer compatibility is insufficient.

Standard (Options)
  • DIN
Connection (Options)
  • Flanged (Wafer)
Material (Options)
  • EN-JL 1040 (GG25) Cast iron
  • Ductile Iron
  • Steel
  • Stainless Steel
Pressure Rating (Options)
  • PN 10
  • PN 16

Datasheet and documents

Description

Concentric butterfly valves, soft seal, bidirectional, for isolation, with certain throttling capability. With ISO flange for easy automation. For use in applications of HVAC, water works, etc. Light and compact. With epoxy coat protection. Operated by hand lever, worm gear or actuator.

Specification of the range:

Diverse design combinations by end connections (wafer type, lug type or double flanged), materials of construction with elastomeric or fluoropolymer seats, nominal size range (DN25-DN1200), design pressure range (PN10-16), as well as operation style and accessories.

Other typical denominations: Wafer concentric butterfly valves

Applications: Water, HVAC, gases, lubrication, compressed air, process, etc.

Certifications: PED 2014/68/EU, WRAS

Certificates

Declaration of Conformity 

WRAS (VF700/VF750 DN25-DN300)

EAC 010-UNIWAT 

EAC 032-UNIWAT 

Declaration of Conformity ATEX

WRAS (VF790 DN50-DN600)

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