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Industriearmaturen Weld End Ball Valves

Weld End Ball Valves in Stainless Steel — Buy Online

Weld-end ball valves in stainless steel 1.4408, 3-piece design, TFM 1600 seat, butt weld or socket weld to ANSI B16.25, DN8 to DN100, up to PN63. TA-Luft, ATEX, SIL 3.

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Weld End Ball Valves

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Product Overview

Weld End Ball Valves: Permanent High-Pressure Shut-Off for Process Pipework

A weld end ball valve — also called a welding ends ball valve — is welded directly into the pipeline instead of bolted or screwed. The permanent joint eliminates every gasket and every mechanical seal at the connection, so no leak path remains at the pipe interface. Consequently the welded design is the standard choice wherever leak-tightness, high pressure, elevated temperature or fugitive-emission limits leave no room for flanged or threaded connections.

Fergo supplies the KH154 series in stainless steel 1.4408 / CF8M throughout — body, weld ends and ball. The three-piece full-bore construction covers DN8 to DN100 (¼ inch to 4 inch) at a consistent PN63 rating, and the TFM 1600 seat handles process temperatures from −29 °C to +175 °C. Weld ends comply with ANSI B16.25 for butt weld and ANSI B16.11 for socket weld, so both preparation types drop straight into standard pipe schedules. Actuator flanges follow ISO 5211, and every valve ships with a blow-out-proof shaft and an antistatic device.

Weld end ball valves serve oil and gas production, refineries and petrochemical plants, high-pressure steam lines, chemical processing, ATEX zones and safety-instrumented systems. Operators choose between a hand lever with locking device, a pneumatic actuator or the J4C electric actuator. Where pipework must remain removable, the flanged ball valve range covers the same pressure classes, and for small-bore utility duty the socket ball valve range offers a screwed alternative.

Subcategories: Weld End Ball Valves by Connection and Actuation

01 KH154 Butt Weld End Ball Valve (ANSI B16.25)

The butt weld ball valve uses tapered ends prepared to ANSI B16.25, which are welded directly to the adjoining pipe of matching schedule. The single continuous butt weld gives the strongest possible joint and the highest fatigue resistance, so this preparation is preferred in oil and gas, petrochemical and high-pressure steam service. Body, weld ends and ball are all stainless steel 1.4408 / CF8M, with a TFM 1600 seat rated to PN63 across DN8 to DN100.

02 KH154 Socket Weld End Ball Valve (ANSI B16.11)

The socket weld ball valve receives the pipe into a machined socket, which is then closed with a fillet weld to ANSI B16.11. This preparation simplifies alignment and reduces the risk of weld distortion at small nominal sizes, so it is the standard choice from DN8 up to about DN50 in chemical, pharmaceutical and instrumentation pipework. The 3-piece body allows straightforward removal of the ball and seat for inspection without cutting the welded ends.

03 Manual Weld End Ball Valve with Hand Lever

The manual KH154 ships with a stainless steel hand lever and an integrated locking device, so the operator can padlock the valve in the open or closed position for lockout and tagout. Full bore reduces pressure drop to a minimum, and the blow-out-proof shaft prevents ejection under pressure. The antistatic device between shaft and ball complies with ISO 7121 and prevents electrostatic charge build-up in flammable service.

Materials in Detail: Specifying the Right Weld End Ball Valve

Body and Ball Materials

1. Stainless Steel 1.4408 / CF8M (AISI 316) — Body, Weld Ends and Ball

Application: chemical and petrochemical processing, oil and gas, high-pressure steam, food and pharmaceutical plants, chloride-rich and marine environments

Temperature: −29 °C to +175 °C with a TFM 1600 seat · PN63 across DN8 to DN100

Advantages: single-material construction across body, weld ends and ball eliminates weld-metal mismatch and simplifies procedure qualification, molybdenum content resists pitting and crevice corrosion, hygienic surface suits CIP and SIP processes

Limitations: higher material cost than carbon steel; not resistant to hydrofluoric acid or strongly reducing media

Seat and Sealing Materials

1. TFM 1600 (Modified PTFE) Seat

Application: standard seat across the KH154 series for chemical, gas, steam and general process duty, including TA-Luft and fugitive-emission service

Temperature: −29 °C to +175 °C · PN63

Advantages: modified PTFE with markedly lower cold-flow tendency than virgin PTFE, tight bubble-free shut-off, near-universal chemical compatibility, approved for TA-Luft fugitive-emission limits

Limitations: higher breakaway torque than soft elastomers; not recommended for highly abrasive slurries

2. PTFE + Graphite Shaft Packing

Application: standard shaft seal on all KH154 variants, whether manual, pneumatic or electric

Temperature: −29 °C to +175 °C

Advantages: graphite reinforcement raises thermal stability and lowers fugitive emissions, self-adjusting through the gland packing, live-loaded design maintains sealing force over thousands of cycles

Limitations: requires periodic gland torque check under severe cyclic duty

3. Antistatic Device to ISO 7121

Application: integrated in every KH154 for flammable, explosive and ATEX-zoned service

Temperature: matches the seat and packing envelope

Advantages: a spring-loaded contact between ball, shaft and body provides continuous electrical bonding, so any static charge is safely dissipated to earth; mandatory for ATEX category II 2G / II 2D installations

Limitations: not a substitute for external earthing on the surrounding pipework

Certificates & Standards for Weld End Ball Valves

Fergo weld end ball valves comply with the Pressure Equipment Directive 2014/68/EU and carry the CE mark. The KH154 series is additionally certified to TA-Luft, ATEX (II 2G Ex h IIB T3 Gb / II 2D Ex h IIIC T180 °C Db), AD2000-A4 and SIL 3 to IEC 61508:2010. Butt weld ends follow ANSI B16.25 and socket weld ends ANSI B16.11, so both preparations match standard ASME B36.10 and B36.19 pipe schedules. Additional guidance for ball valves in petroleum service is provided by MSS SP-72, which Fergo consults during design review. Actuator mounting flanges comply with ISO 5211, and the antistatic device meets ISO 7121.

Inspection documents to EN 10204 — the type 2.2 works certificate or the type 3.1 inspection certificate — are available on request, and Positive Material Identification (PMI) reports can be supplied for critical service. A full overview of all certificates is published on the Fergo certificate page. You can verify seat and body compatibility with your medium beforehand using the Fergo resistance check.

Delivery & Availability

Fergo holds more than 25,000 industrial valves in stock. Around 44 of them are weld end ball valves from the KH154 series — covering every common nominal size, both butt weld and socket weld preparations, and all actuation types. Automation is carried out in-house with pneumatic actuators or the J4C electric actuator, so a pneumatic weld end ball valve or an electric weld end ball valve leaves the warehouse fully assembled and tested, with no hidden surcharges. A Switchmaster limit switch box provides visual and electrical position feedback for automated packages.

Fergo ships across Europe — including the United Kingdom, the Nordic countries and all other EU member states. Smaller weld end sizes up to roughly DN50 travel by parcel service, whereas larger or fully automated assemblies go by forwarding agent. Express shipping delivers within the next working days. You will find shipping costs, payment options and express terms on the shipping and payment terms page. For special alloys, extended weld ends, oxygen-service preparation or complete skid-mounted automation packages, please contact us through the customised solutions section.