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Sanitary Butterfly Valve Complete Buying Guide

Table of Contents

The butterfly valve is used to control or shut off fluid by the valve disc. A Sanitary butterfly valve is different from an industrial butterfly valve, it normally uses high purity stainless steel 304 or 316L and the inside surface is well polished, not retain the fluid. Usually used in food processing and beverage, dairy, pharmaceutical industries.

Material

DONJOY Sanitary butterfly valve uses stainless steel as the body material and disc, with SS304, SS316L.

Valve body and disc are integral forged processing and machining by CNC machines, stronger and better than casting.

Pressure

10 bar, 150 psi, 1 Mpa, PN 10

Surface roughness

Sanitary application requires better surface roughness, inside mirror polish treatment, roughness RA 0.8 μm default. (Mep Ra 0.6 μm, Eep Ra 0.4 μm ). Outside matt RA 1.2μm default.

Handles

Pull handle

It has two, three, four holes, three holes is the default and most commonly use.

The hole for the pull handle means the position, 3 holes means open, middle open, close, 3 positions.

pull handle
Multi-position plastic handle

It has a plastic handle and 12 positions

Multi-position plastic handle
Multi-position Stainless Steel Handle

It has a stainless steel handle and 12 positions

Multi-position Stainless Steel Handle
Multi-position Stainless Steel Handle Lockalbe

It has a stainless steel handle and 12 positions and could be equipped with a lock.

Multi-position Stainless Steel Handle Lockalbe
Fine-tuning handle

It’s fine-tuning handle and with dial

Fine-tuning handle butterfly valve
Pull handle with limit switch

The pull handle with the limit switch, sensor open and close position

Pull handle with limit switch

Standard

Donjoy butterfly valve can meet 3A, SMS, DIN11850-1, DIN11850-2, ISO, RJT standards.

And we can produce the customized long weld end.

image

Connections.

Weld end, tri-clover (clamp end), thread male/female(BSPT, BSP, NPT), flange PN10, PN16, square flange

Two-way butterfly valve

image 3

Three-way butterfly valve

image 2

Seal gasket

· EPDM rubber (ethylene propylene diene monomer rubber)is a type of synthetic rubber that is used in many applications.

·Teflon(PTFE) Polytetrafluoroethylene (PTFE) is a synthetic fluoropolymer of tetrafluoroethylene that has numerous applications.

· Viton(FPM) Viton is a brand of FKM, a synthetic rubber and fluoropolymer elastomer commonly used in seals, chemical-resistant gloves, and other moulded or extruded goods.

· Silicone rubber is an elastomer (rubber-like material), usually used in the pharmaceutical industry.

· NBR Nitrile rubber, also known as nitrile butadiene rubber, NBR, Buna-N, and acrylonitrile-butadiene rubber, is a synthetic rubber derived from acrylonitrile (ACN) and butadiene.

For more information, please check this article How to select O-ring seal for the sanitary valve.

Butterfly Valve Actuators

Actuators to realise automatic operation:

  • NC operated: single-acting, normally closed (fail closed)—air to open, spring to close
  • NO operated: single-acting, normally open (fail open)—air to close, spring to open
  • AA operated: double-acting, air to open, air to close

pneumatic stainless steel actuator (vertical type),

pneumatic stainless steel actuator (vertical type)

pneumatic aluminium actuator (horizontal type),

pneumatic aluminium actuator (horizontal type)

electric actuator.

on/off type or intelligent regulating type

DC24V/ AC24V/ 110V/ 220V/ 50Hz/ 60Hz

electric actuator

Control Top C-TOP

C TOP 1721 2
Control top 1721 PNP version

Control top 1721 PNP version for single-acting 1 solenoid, input PNP 24V, output 2 positions, PNP 24V 4-20mA

Control top 1721 PNP version for double-acting 2 solenoid, input PNP 24V, output 2 positions, PNP 24V 4-20mA

Control top 1721 PNP version for three-acting 3 solenoid, input PNP 24V, output 4 positions, PNP 24V 4-20mA, used for mixproof butterfly valve

Control top 1721 ASI BUS 3.0 version

ASI BUS 3.0 version, maximum to control 62 units

Control top 1721 dcs version

Positioner IL-TOP-1831

IL-TOP-1831 Valve Positioner

Positioner IL-TOP-1831, RS485 0/4 – 20mA, input 0/4-20mA, single-acting and double-acting.

Positioner IL-TOP-1831-P, with feedback input 0/4-20mA, output 0/4 -20mA, single-acting and double-acting.

Positioner IL-TOP-1831-Pid, with process control 4-20mA/ PT100, single-acting and double-acting.

Feedback Top, F-Top-1553

Feedback dvice F TOP 1553

F-Top-1553 PNP for the single-acting and double-acting vertical actuator, 3 positions, 4-20mA.

Sanitary Butterfly Valve for Powder Processing

Normally butterfly valve for liquid flow, if used for powder processing, we will recommend use powder butterfly valve or make a special smaller disc with less pressure, if regular butterfly valve use for powder, the gasket will be easily worn out.

Sanitary Powder Butterfly Valve

Sanitary 3-pieces butterfly valve

Sanitary Manual Three-pieces butterfly valve is easy to maintain and install.

Sanitary 3-pieces butterfly valve

Double Seat Mixproof Butterfly Valve Type A

It with one disc, two seals

Mixproof Butterfly Valve Type A
mixproof butterfly valve type A working principle
mixproof butterfly valve type-A working principle

Double Seat Mixproof Butterfly Valve Type B

It with two discs, two seals

Mixproof Butterfly Valve Type B
mixproof butterfly valve type B working principle
mixproof butterfly valve type B working principle

Stainless Steel Tri-clamp Butterfly Valve Packing Picture

sanitary butterfly valve packing

Buy sanitary butterfly valve

Donjoy Technology CO., LTD as sanitary butterfly manufacturer in China. Founded in 1993, have more than 28 years of experience in producing hygienic butterfly valves, ball valves, diaphragm valves, shutoff valves, globe valves and angle seat valves and so on. Produced more than 3 million hygienic butterfly valves. It’s the best choice for you to buy a sanitary butterfly valve from China.

Donjoy Hygienic Butterfly Valve Advantage

Direct factory sales, get the wholesale price of the butterfly valve.

Provide OEM service for butterfly valves with your own brand.

Great quality, supply for brands Unilever, P&G, Budweiser, Coca Cola, Nestle…

Sanitary valves have 3-A certified, FDA 21 CFR177.2600, CE PED 2014/68/EU and MD-06/42/EC

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Donjoy Technology Factory
Donjoy Technology Introduction Video.

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