Butterfly valve - UNIWAT Fig. VF750 | Comeval

Name: Butterfly valve - UNIWAT Fig. VF750 | Comeval
Brand: Comeval
SKU: Butterfly valve - UNIWAT Fig. VF750 | Comeval

Butterfly Valve Lug Comeval UNIWAT VF750

The UNIWAT VF750 is a concentric lug-type butterfly valve with a soft seat and bidirectional sealing. It is primarily intended for flow isolation in HVAC systems, water networks, process lines, compressed air, neutral gases, and lubrication circuits. It offers limited throttling capability but is not designed for continuous control valve operation without Kv, differential pressure, and opening angle control.

Standards and Operating Limits

Design: EN 593, EN 12516, DIN 3840.
Face-to-face: EN 558 Series 20 / DIN 3202 K1.
Connection: lug between flanges EN 1092-1/2 PN10/PN16.
Pressure: PN16 DN25–DN300, PN10 DN350–DN1200, with PN16 available for larger DN where applicable.
For PTFE seat: PN10 DN40–DN600.
Testing: EN 12266-1, leakage Rate A.
Top flange: ISO 5211 for actuator.

Materials and Seats

The body is available in EN-JL1040 cast iron, EN-JS1030 ductile iron, CF8M stainless steel, or WCB steel. Discs include ductile iron nickel plated, CF8M, aluminum bronze, and 904L. Seats: NBR, EPDM, Viton, Silicone, Hypalon, and fluoropolymer options FEP/PFA per version.

Lug vs. Wafer

The VF750 is chosen over the VF700 when a body with lugs and independent bolting per flange is required. This allows disconnection of one side of the piping without disturbing the other. In dead-end service, lug butterfly valves typically have reduced pressure ratings, so confirmation per DN and pressure is necessary.

Operation

Available with lever, gearbox, bare shaft, pneumatic, or electric actuator. For DN >200, a gearbox is usually considered due to handling torque.

FAQ

When is EPDM selected?
For water, HVAC, and neutral fluids without hydrocarbons.

Are there certifications?
Refer to PED 2014/68/EU, Machinery Directive 2006/42/EC, WRAS for VF750 DN25–DN300, and ATEX/EAC declarations per version.

Standard (Options)

Connection (Options)

Flanged (Lug)

Material (Options)

EN-JS 1030 (GGG40) Ductile Iron
EN-JL 1040 (GG25) Cast 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: Lug concentric butterfly valves

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

Certifications: Concentric butterfly valves declaration of conformity, Concentric butterfly valves declaration of conformity atex, Concentric butterfly valves test di migrazione dm174, Concentric butterfly valves wra