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.

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)mmin.
2431.69
2 1/2461.81
3461.81
4522.06
5562.19
6562.19
8602.38
10682.69
12783.06
14783.06
161024.00
181144.50
201275.00
241546.06
301656.50
362007.88
422519.88
4827610.88
Face-to-face Dimensions, Category B Valves
Lug and Wafer typeDouble-flanged Long typeDouble-flanged Short type
DN
(inch)
150lb300lb600lb150lb300lb600lb150lb300lb600lb
mmin.mmin.mmin.mmin.mmin.mmin.mmin.mmin.mmin.
3481.88481.88542.122038.0028211.12356141144.501807.091807.09
4542.12542.12642.502299.0030512.00432171275.001907.481907.48
6572.25592.31783.0626710.5040315.88559221405.503308.272108.27
8642.50732.881024.0029211.5041816.50660261526.003509.062309.06
10712.81833.251174.6233013.0045718.00787311656.502509.842509.84
12813.19923.621405.5035614.0050219.75838332707.0017810.6327010.63
14923.621174.621556.1238115.0076230.00889351907.5029011.4229011.42
161024.001335.251787.0040616.0083833.00991392168.5031012.2031012.2
181144.501495.882007.8843217.0091436.001092432228.7521012.9933012.99
201275.001596.252168.5045718.0099139.001194472299.0023013.7835013.78
241546.061817.122329.1350820.00114345.0013975526710.5039015.3539015.35
2655922.00124549.0014485729211.5041016.14
2861024.00134653.0015496129211.5043016.93
3061024.00139755.0016516531812.5245017.72
3266026.00152460.0017787031812.5247018.50
3671128.00172768.0020838233012.9951020.80
3841016.1453020.87
4041016.1455021.65
4241016.1457022.44
4847018.5063024.80

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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