Butterfly valves

GENUINE EQUIPMENT

Tecofi cast-iron butterfly valves in wafer, lug and flanged versions, with nickel-plated cast-iron or 316 stainless discs and lever, gearbox or electric-actuator operation; CWT butterfly valves up to NPS 36. CAD supplies datasheets, CO/CQ and model advice.

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Tecofi cast-iron butterfly valves

A butterfly valve throttles or shuts off flow with a disc that turns a quarter turn; it is more compact and lighter than a gate valve of the same size, which is why it is so common in water, HVAC and plant pipework. Tecofi (France) offers ductile iron EN-GJS-400-15 bodies in wafer, lug or flanged form, nickel-plated cast-iron or 316 stainless discs, and for many models a lever version (-02) and a gearbox version (-08); VPG4448 also comes with an ON/OFF electric actuator. CWT butterfly valves from NPS 2" to 36" are listed too.

ConnectionTecofi modelMaterialsWorking pressure
Wafer, between PN10/16 and ASA150 flangesVPG4448, VPG4449Ductile iron EN-GJS-400-15 body; nickel-plated ductile iron disc (4448) or 316 stainless (4449)16 bar
WaferVPE4408, VPE4409, VPE4448, VPE4449Ductile iron EN-GJS-400-15 body; nickel-plated ductile iron or 316 stainless disc; Heat EPDM or EPDM ACS seat10 bar (PN10), 16 bar (PN16)
LugVPG4648, VPG4649Ductile iron body; nickel-plated ductile iron (4648) or 316 stainless (4649) disc16 bar
LugVPE4608, VPE4609, VPE4648, VPE4649Ductile iron body; ductile iron or 316 stainless disc10 bar (PN10), 16 bar (PN16)
FlangedVP4548; VPE4508, VPE4509, VPE4548, VPE4549Ductile iron EN-GJS-400-15 body; nickel-plated ductile iron or 316 stainless disc16 bar (VP4548, PN16); 10 bar (PN10), 16 bar (PN16) for the VPE range
Wafer, ON/OFF electric actuatorVPG4448-N24EPNickel-plated ductile iron body and disc; TEA single-phase 230 V actuator, 2 limit switches, emergency handwheel16 bar
Flange, lug, wafer, BWCWT butterfly valvesASME B16.34, API 609; concentric or offset (double/triple offset)Class 150 to 600

Brands listed here: Tecofi, CWT. CAD sends the datasheet and size tables (DN32/40 to DN300 for VPG4448), supplies CO/CQ and advises on the model by medium, temperature, pressure and operation. Further reading: Tecofi valves for the Gia Tan water plant, Dong Nai.

See also: Industrial valves, Water and HVAC valves, Check valves, Gate valves, Ball valves.

How does a wafer valve differ from a lug valve?

A wafer valve is clamped between two pipe flanges; a lug valve has threaded lugs that take bolts on each flange side. The two do the same job; only the mounting differs.

Lever or gearbox?

A lever (-02) is quick and simple for small sizes; a gearbox (-08) cuts the effort on large sizes. For remote operation choose the electric-actuator version. Send the DN, pressure and medium and a CAD engineer will pick the model.

Frequently asked questions

What is a butterfly valve and where is it used?

A butterfly valve regulates or shuts off flow with a disc that turns a quarter turn. It is more compact and lighter than a gate valve of the same size, so it is very common on water pipelines, HVAC systems and in plants.

What are Tecofi butterfly valves made of, and what pressure do they handle?

Tecofi butterfly valves have a ductile iron EN-GJS-400-15 body and a nickel-plated ductile iron or 316 stainless steel disc. Per the datasheets, the VPG4448/4449 series works at 16 bar and the VPE series at 10 bar (PN10) or 16 bar (PN16), with Heat EPDM or EPDM ACS seats depending on the model.

What sizes do the butterfly valves come in?

For the VPG4448, CAD sends the dimension table from DN32/40 to DN300. Besides Tecofi, CAD offers CWT butterfly valves from NPS 2" to 36" to ASME B16.34 and API 609, concentric or offset designs, Class 150 to 600. Send the DN and working pressure and CAD engineers will select a suitable model.

Can a butterfly valve be fitted with an electric actuator?

Yes. The VPG4448-N24EP is a wafer butterfly valve with nickel-plated ductile iron body and disc, fitted with a TEA single-phase 230 V ON/OFF electric actuator with 2 limit switches and an emergency handwheel, rated 16 bar. Other models have a lever or a gearbox handwheel.

What should I send for a butterfly valve quote?

Send the DN, pressure, temperature, medium, connection type (wafer, lug or flanged) and how you want to operate it (lever, gearbox or electric). CAD replies with the datasheet, CO/CQ and a quote within 24 working hours via the contact page; the Tecofi and CWT valves CAD supplies are genuine.

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