What is API 609

API 609 refers to the American Petroleum Institute butterfly valve standard. API 609 specifies the design, materials, testing, FTF and dimensions of butterfly valves.The standard covers different types of butterfly valves, including lug-type butterfly valves, wafer-type butterfly valves and double-flange butterfly valves. 

There are two catagories of API 609: A and B. Catagory A refers to concentric butterly valves, while Catagory B refers to eccentric butterfly valves.

When selecting an API 609 butterfly valve, factors such as material of construction, connection type (lug, wafer, or flange), pressure rating, temperature range, and flow characteristics should be considered.

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API 609 Valves Type For Your Choice

  1. Connection: Wafer, Flange(double flange, single flange), Lug.
  2. Structure: center line, double eccentric, triple eccentric.
  3. Body material: Ductile Iron(GGG40/50), LCB, Carbon Steel(WCB A216),  Stainless Steel(SS304/SS316/SS304L/SS316L) , Duplex Stainless Steel(2507/1.4529).
  4. Disc material: DI(Ni lined), WCB (A216), Stainless Steel(SS304/SS316/SS304L/SS316L) , Duplex Stainless Steel(2205/2507).
  5. Seat: Rubber (EPDM, NBR), PTFE, Metal.
  6. Actuator Options: Lever, Worm Gear, Electric Actuator, Pneumatic Actuator.
  7. Pressure rating: PN6-PN40.
  8. Temperature range: -46~+425℃.
butterfly valve structure
As you know, the price of API 609 butterfly valve requires relatively complex combination calculation, so if you have any questions, please contact us, we are always here.

Browse our API 609 Butterfly Valve Categories

Why Choose US

ABOUT US

ZFA VALVE factory Founded in 2006,  mainly produce API 609 butterfly valves, valve parts which compliance with valve international standard.

We have got ISO, CE, Wras, API certificates etc.

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OEM Capacity

We have 32 machines (include CNC, machine center, semi-auto machine, pressure testing machine, etc.)

The most important is that we have tens of molds in hand, such as wafer/flanged/lug valve body, disc, seat, handle molds.

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Butterfly Valve Manufacturing Process

We’re a real butterfly valve factory with 17 years production experience, OEM for some customers around the world. All butterfly valves sold by ZFA VALVE are manufactured in our own factory. The excellent quality of our products comes from the meticulous management of the production process. ZFA VALVE is proud to show you our real production scene. Here is our motto: Rigorous production leads to excellent quality!

valve body raw material casting

Step 1: Casting

Machining_Butterfly_Valve_Parts

Step 2:Material Preparation

The_spheroidization_rate_was_measured_by_metallograph

Step 3:Material Quality Inspection

maching3

Step 4:Machining Parts

spraying body

Step 5:Surface Treatment

Butterfly_valve_installation

Step 6:Assembly

pressure testing3

Step 7:Inspection And Quality Control

packing

Step 8: Packaging

container

Step 9: Distribution

Producing Process of Butterfly Valve Parts

body-machining

Valve Body of Butterfly Valve

butterfly valve disc machining

Valve Disc of Butterfly Valve

soft-backed seat butterfly valve

Soft-backed Seat of Butterfly Valve

Factory Overview

eccentric valve store
DN1800 AWWA C504 BUTTERFLY VALVE

Get More Videos about MANUFACTURING PROCESS, and CAD DAWING about the butterfly valve, please contact us!

Certificates

certificates wras of zfa valve

FAQ

1.What is the Face to face dimensions of API 609 Butterfly Valve?

A:

Face-to-face Dimensions, Category A Valves (Lug and Wafer type)
DN(INCH) mm in.
2 43 1.69
2 1/2 46 1.81
3 46 1.81
4 52 2.06
5 56 2.19
6 56 2.19
8 60 2.38
10 68 2.69
12 78 3.06
14 78 3.06
16 102 4.00
18 114 4.50
20 127 5.00
24 154 6.06
30 165 6.50
36 200 7.88
42 251 9.88
48 276 10.88
Face-to-face Dimensions, Category B Valves
Lug and Wafer type Double-flanged Long type Double-flanged Short type
DN
(inch)
150lb 300lb 600lb 150lb 300lb 600lb 150lb 300lb 600lb
mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in. mm in.
3 48 1.88 48 1.88 54 2.12 203 8.00 282 11.12 356 14 114 4.50 180 7.09 180 7.09
4 54 2.12 54 2.12 64 2.50 229 9.00 305 12.00 432 17 127 5.00 190 7.48 190 7.48
6 57 2.25 59 2.31 78 3.06 267 10.50 403 15.88 559 22 140 5.50 330 8.27 210 8.27
8 64 2.50 73 2.88 102 4.00 292 11.50 418 16.50 660 26 152 6.00 350 9.06 230 9.06
10 71 2.81 83 3.25 117 4.62 330 13.00 457 18.00 787 31 165 6.50 250 9.84 250 9.84
12 81 3.19 92 3.62 140 5.50 356 14.00 502 19.75 838 33 270 7.00 178 10.63 270 10.63
14 92 3.62 117 4.62 155 6.12 381 15.00 762 30.00 889 35 190 7.50 290 11.42 290 11.42
16 102 4.00 133 5.25 178 7.00 406 16.00 838 33.00 991 39 216 8.50 310 12.20 310 12.2
18 114 4.50 149 5.88 200 7.88 432 17.00 914 36.00 1092 43 222 8.75 210 12.99 330 12.99
20 127 5.00 159 6.25 216 8.50 457 18.00 991 39.00 1194 47 229 9.00 230 13.78 350 13.78
24 154 6.06 181 7.12 232 9.13 508 20.00 1143 45.00 1397 55 267 10.50 390 15.35 390 15.35
26 559 22.00 1245 49.00 1448 57 292 11.50 410 16.14
28 610 24.00 1346 53.00 1549 61 292 11.50 430 16.93
30 610 24.00 1397 55.00 1651 65 318 12.52 450 17.72
32 660 26.00 1524 60.00 1778 70 318 12.52 470 18.50
36 711 28.00 1727 68.00 2083 82 330 12.99 510 20.80
38 410 16.14 530 20.87
40 410 16.14 550 21.65
42 410 16.14 570 22.44
48 470 18.50 630 24.80

2. What is function of butterfly valve?
A: Butterfly valve is also called ON-OFF valve, it is used for flow control: start and stop the fluid.
3. What are the main applications of API 609 butterfly valves?
API 609 butterfly valves are used in industries such as water, oil and gas, chemical processing, power generation, water treatment, HVAC, and more.
4. What is the actuator of API 609 butterfly valve?
A: Worm Gear, Electric, and Pneumatic can be selectable.
5. Can you casting our Logo on the Valve body?
A: Yes, we provide OEM service, you can design your Logo and packing etc.

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