Home / Ball Valves / Carbon Steel / API 608 WCB Carbon Steel Ball Valve

BAUTU API 608 WCB carbon steel ball valve with ISO 5211 mounting pad, flanged

BAUTU API 608 WCB ball valve body with cast 2-150 WCB marking

BAUTU WCB carbon steel ball valve, flanged, before painting

Carbon steel ball valve · Soft-seated · Made in Wenzhou

API 608 WCB Carbon Steel Ball Valve — ISO 5211 Direct Mount

MODEL GQ41F-150LBC · API 608 / ASME B16.34 · TESTED PER API 598

Flanged floating ball valve with an ASTM A216 WCB carbon steel body and a built-in ISO 5211 mounting pad, so a pneumatic or electric actuator bolts straight on. Supplied with a hand lever or with an actuator. PTFE seat with zero visible leakage per API 598; paint colour made to your specification.

SizeNPS ½″–8″

Class150 / 300

BodyASTM A216 WCB

SeatPTFE / RPTFE

TopISO 5211 pad

OperationLever or actuator

Actuator mounts directly on the ISO 5211 pad, no bracket needed
Every valve shell and seat tested per API 598, test report in every shipment
Paint colour made to your specification
Standard sizes ship in 15–20 days

Request a Quote WhatsApp Us

An engineer replies within 24 hours. Send size, class, material and quantity. Download GA drawing (PDF) →

Specifications Materials Dimensions Pressure rating Testing How to order Video FAQ

Specifications

Technical Data

Design standard	API 608 / ASME B16.34
Face-to-face	ASME B16.10
Flanges	ASME B16.5, raised face
Size range	NPS ½″–8″ (DN15–DN200)
Pressure class	Class 150 / Class 300
Body material	ASTM A216 WCB carbon steel
Paint colour	Made to your specification (send a RAL code or colour sample)
Ball	SS304 / SS316
Seat	PTFE (standard) · RPTFE (option)
Temperature	−29 °C to +150 °C (PTFE) · up to +180 °C (RPTFE)
Construction	Two-piece body, floating ball, anti-static device
Top flange	ISO 5211 mounting pad for direct actuator mounting
Operation	Hand lever, pneumatic or electric actuator
Testing	API 598 — every valve
Fire test	API 607 certification in application

Application

Where It Is Used

For on/off lines that are automated now or will be later. The ISO 5211 pad saves the cost and play of a separate bracket.

Automated on/off valves in process plants
Skid builders and OEMs fitting their own actuators
Water treatment and industrial utilities
Oil, gas and water lines in non-corrosive service
Oil and gas plant and terminal piping

Ball valve assembly hall at the BAUTU plant in Wenzhou

ASSEMBLY HALL · WENZHOU

Construction

Parts & Materials

From our GQ41F general assembly drawings (Class 150 and Class 300). Every body casting is marked with size, class and material. The same valve is also made with CF8 or CF3M stainless bodies.

Part	WCB body
Body / Bonnet	A216 WCB
Ball	SS304
Stem	A182 F304
Seat	PTFE
Body gasket	PTFE
Stem packing	PTFE
Thrust washer	PTFE
O-ring	FPM
Anti-static spring	17-7PH
Studs / Nuts	A193 B7 / A194 2H
Gland	A351 CF8
Stop plate	A276 304
Lever	A216 WCB

Dimensions

Dimensions (mm)

Class 150

NPS	DN	L	D	D1	D2	T	f	n-Ød	Stem F×F	ISO 5211	M
½″	DN15	108	90	60.3	35.1	11.6	2	4-Ø16	9×9	F03/F05	162
¾″	DN20	117	100	69.9	42.9	13.2	2	4-Ø16	9×9	F03/F05	162
1″	DN25	127	110	79.4	50.8	14.7	2	4-Ø16	11×11	F04/F05	162
1¼″	DN32	140	115	88.9	63.5	16.3	2	4-Ø16	11×11	F04/F05	162
1½″	DN40	165	125	98.4	73.2	17.9	2	4-Ø16	14×14	F05/F07	242
2″	DN50	178	150	120.7	91.9	19.5	2	4-Ø19	14×14	F05/F07	242
2½″	DN65	190	180	139.7	105	22.7	2	4-Ø19	17×17	F07/F10	242
3″	DN80	203	190	152.4	127	24.3	2	4-Ø19	17×17	F07/F10	242
4″	DN100	229	230	190.5	157	24.3	2	8-Ø19	19×19	F07/F10	289
5″	DN125	356	255	215.9	186	24.3	2	8-Ø22	22×22	F10/F12	450
6″	DN150	394	280	241.3	216	25.9	2	8-Ø22	27×27	F12/F14	550
8″	DN200	457	345	298.5	270	29	2	8-Ø22	27×27	F14/F16	650

Class 300

NPS	DN	L	D	D1	D2	T	f	n-Ød	Stem F×F	ISO 5211	M
½″	DN15	140	95	66.7	35.1	14.7	2	4-Ø16	9×9	F03/F05	162
¾″	DN20	152	115	82.6	42.9	16.3	2	4-Ø18	9×9	F03/F05	162
1″	DN25	165	125	88.9	50.8	17.9	2	4-Ø18	11×11	F04/F05	162
1¼″	DN32	178	135	98.4	63.5	19.5	2	4-Ø18	11×11	F04/F05	162
1½″	DN40	190	155	114.3	73.2	21.1	2	4-Ø22	14×14	F05/F07	242
2″	DN50	216	165	127	91.9	22.7	2	8-Ø18	14×14	F05/F07	242
2½″	DN65	241	190	149.2	105	25.9	2	8-Ø22	17×17	F07/F10	242
3″	DN80	282	210	168.3	127	29	2	8-Ø22	17×17	F07/F10	242
4″	DN100	305	255	200	157	32.2	2	8-Ø22	19×19	F07/F10	289
5″	DN125	381	280	235	186	35.4	2	8-Ø22	22×22	F10/F12	450
6″	DN150	403	320	269.9	216	37	2	12-Ø22	27×27	F12/F14	550
8″	DN200	502	380	330.2	270	41.7	2	12-Ø26	27×27	F14/F16	650

From our GQ41F general assembly drawings. L = face-to-face (ASME B16.10) · D = flange O.D. · D1 = bolt circle · D2 = raised face O.D. · T = flange thickness · f = raised face height · n-Ød = bolt holes · Stem F×F = stem drive square · ISO 5211 = actuator mounting flange · M = lever length. Flanges to ASME B16.5.

Class 150 GA Drawing (PDF)Class 300 GA Drawing (PDF)

Face-to-face length of a ball valve checked with a caliper

FACE-TO-FACE CHECK

Quality certificate tag on a BAUTU ball valve

QC TAG ON EVERY VALVE

Checked before packing

Face-to-face and flange dimensions are checked with calipers against ASME B16.10 and B16.5, and the ISO 5211 pad is checked so the actuator fits first time.

Pressure rating

Max. Working Pressure at 38 °C

Body material	Class 150 (bar)	Class 300 (bar)
WCB (Group 1.1)	19.6	51.1

Body ratings per ASME B16.34. The seat sets the temperature limit: +150 °C with PTFE, +180 °C with RPTFE.

Testing

API 598 Test on Every Valve

Test	Class 150	Class 300
Shell test (water)	3.0 MPa	7.5 MPa
Seat test (water)	2.2 MPa	5.5 MPa
Seat test (air)	0.6 MPa	0.6 MPa

Test pressures from our GQ41F GA drawings; actual values for each valve are on the test report.

Checking stainless steel ball valve bodies with a handheld spectrometer

MATERIAL CHECK · SPECTROMETER

▶ PRESSURE TEST VIDEO

Quality records

Mill Test Certificate (EN 10204 3.1) in Every Shipment

Heat number of the body casting
Chemical composition against ASTM limits
Mechanical properties: tensile, yield, elongation
Shell and seat test pressure and hold time per API 598
Signed and stamped by our QC department

BAUTU ball valve mill test certificate, EN 10204 type 3.1 sample with heat number, chemical composition and mechanical properties

SAMPLE MTC · EN 10204 3.1 · CLICK TO OPEN

We welcome third-party inspection (e.g. SGS or BV), arranged and paid for by the buyer; inspectors get full access to our plant and test bench.

Download Sample MTC (PDF)

How to order

Model Code GQ41F-150LBC

GHigh platform (ISO 5211 pad)

QBall valve

4Flanged ends

1Floating ball, straight-through

FPTFE seat

150LBPressure class

CBody material (C = WCB)

The model code is printed on the nameplate and the QC tag. We confirm the full code on the order confirmation.

Send us these 8 details for a fast quote

Size (NPS or DN)
Pressure class (150 / 300)
Paint colour (RAL code or sample)
Seat (PTFE / RPTFE)
Lever, or actuator type and supply (air pressure / voltage)
Media and temperature
Quantity
Destination port

Request a Quote WhatsApp Us

Made in one plant

From Machining to Crate in Wenzhou

Machining a stainless steel ball valve body

01 MACHINING

Drilling the flange bolt holes of a ball valve body

02 DRILLING

Tightening body bolts during ball valve assembly

03 ASSEMBLY

Ball valve clamped in the API 598 hydraulic test press

04 API 598 TEST

See the valve before you order

Real footage of the valve from our plant. Want to see your own order? Book a live video call and we show your valves on the test bench.

Book a Video Tour

Export crates ready to ship in front of the BAUTU plant in Wenzhou

CRATED AT OUR PLANT

Packing & delivery

Packed for Sea Freight

Flange faces capped to protect the raised face
Each valve bagged; the order packed in plywood cases
MTC (EN 10204 3.1) inside every case
Standard sizes ship in 15–20 days

FAQ

Frequently Asked Questions

Can I mount my own actuator on this valve?

Yes. The top of the valve is an ISO 5211 mounting pad, so any pneumatic or electric actuator with the matching ISO 5211 flange and drive bolts on directly. The pad size and stem square for each valve size are in the dimension table above.

What is the difference from your API 608 manual ball valve?

Same body standard, materials and test. The manual valve has a small top pad for a hand lever; this high-platform valve has a full ISO 5211 pad, so it costs a little more but takes an actuator without a bracket. For valves that will stay manual, the API 608 manual ball valve is the better buy.

When should I choose WCB instead of stainless steel?

WCB carbon steel suits non-corrosive water, oil and gas and costs less than stainless. For chlorides, seawater or chemical service, choose a CF8 or CF3M stainless body: see our API 608 high-platform ball valve, the same valve in stainless steel.

Can you paint the valves in our colour?

Yes. The paint colour of WCB valves is made to your specification. Send us the RAL code or a colour sample with your enquiry.

What temperature can the seat take?

Standard PTFE seats are rated −29 °C to +150 °C. RPTFE seats are available for service up to +180 °C. For hotter media, use our metal-seated ball valve.

What documents ship with the valve?

A product test report with the heat number of the body casting, chemical composition, mechanical properties and the pressure test results. We welcome third-party inspection (e.g. SGS or BV), arranged and paid for by the buyer.

What is the lead time?

Standard sizes ship in 15–20 days from stock. Special materials or options may take longer; we confirm the delivery date with your quote.

Is the valve fire-safe or API certified?

It is designed and built to API 608 and ASME B16.34, and every valve is pressure-tested per API 598. We do not hold an API Monogram licence. API 607 fire-type testing and ISO 9001 are in application, so the valve is not yet fire-safe certified. Every order ships with a Product Test Report (heat number, chemistry, mechanical properties and API 598 test results). Third-party inspection (e.g. SGS or BV) is welcome, arranged by the buyer.