Buttefly valve - UNIWAT Fig. VF7U0 | Comeval

Name: Buttefly valve - UNIWAT Fig. VF7U0 | Comeval
Brand: Comeval
SKU: Buttefly valve - UNIWAT Fig. VF7U0 | Comeval

Butterfly Valve Comeval UNIWAT VF7U0

The UNIWAT VF7U0 is a concentric butterfly valve of the U / flanged short pattern type, featuring a soft seat and bidirectional sealing. Primarily used for isolation in HVAC systems, water networks, process fluids, compressed air, neutral gases, and auxiliary lubrication circuits. Throttling operation is feasible only under control of disc angle, Kv, and differential pressure.

Standards and Pressure

Design: EN 593, EN 12516, DIN 3840
Face-to-face: EN 558 Series 20 / DIN 3202 K1
Connection: EN 1092-1/2 type 11/B
Pressure: PN16 DN25–DN300, PN10 DN350–DN1200
Optional: PN16 DN350–DN1200
PTFE seat: PN10 DN40–DN600
Top flange: ISO 5211
Testing: EN 12266-1
Seat leakage: Rate A, complete sealing in both directions

Materials and Seats

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

Application Limits

For water networks, the manufacturer recommends a maximum velocity of 3 m/s for PN10 and 4 m/s for PN16. For potable water, TSmax 80 °C is noted. Seat selection should be based on pressure-temperature, fluid compatibility, and potential elastomer swelling.

Handling

Accepts handle, gearbox, bare shaft, or actuator. Gearbox is recommended for larger DN or when operating torque increases due to ΔP or seat material.

FAQ

When to choose VF7U0 over VF790?
When a U-type flanged construction with shorter face-to-face Series 20 is required, instead of a double flanged body Series 13.

What to check before ordering?
DN, PN, seat, disc material, fluid, temperature, ΔP, flow velocity, and actuation type.

Standard (Options)

Connection (Options)

Flanged (Wafer)

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 isolaton, 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: U type 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