Split-Body Valves - ANSI150/300/600 Series 68 | Valpres

Valpres Series 68 ANSI 150/300/600 Ball Valves

Valpres Series 68 is a two-piece flanged ball valve manufactured for on/off isolation in industrial process lines. The valve is built to ANSI/API 608 requirements and is available in ANSI Class 150, 300 and 600 pressure ratings, corresponding approximately to PN20, PN50 and PN100.

Operating temperature range is -20°C to +180°C, depending on media compatibility, pressure and sealing materials. Vacuum service down to 10⁻³ torr is possible where the process conditions and installation practice are suitable.

Material Variants

• 68J: ASTM A351 CF8M stainless steel body with A479 TP316 ball. Used for general corrosive liquids, water-based chemicals and many utility services.
• 68F: ASTM A352 LCC carbon steel body with A479 TP316 ball. Selected where low-temperature carbon steel body construction is required.
• 68R: ASTM A995 Gr.6 body with UNS S32760 ball and stem. Used for more demanding chloride-bearing or corrosive process fluids where super duplex metallurgy is specified.

Sealing and Leakage Control

The standard sealing arrangement includes RPTFE seats, graphite stem packing, an RPTFE thrust washer and FKM O-rings. This configuration is intended for tight shut-off and isolation duty, not for continuous throttling or flow modulation.

Seat and elastomer compatibility must be checked against the fluid, temperature, pressure, cleaning chemicals and expected cycling frequency.

Sizes, Pressure Classes and Actuation

• ANSI 150 and ANSI 300: available up to DN150, with reduced-bore configurations on selected sizes.
• ANSI 600: available from DN15 to DN50.
• Actuator interface: ISO mounting pads F04 to F12 allow installation of pneumatic or electric actuators for remote isolation, interlocking or automated shutdown service.

Typical Applications and Suitable Media

• chemical and petrochemical process lines
• higher-pressure utility headers
• process gases and compatible liquids
• vacuum lines and isolation points
• installations requiring CF8M, LCC or super duplex body selection based on corrosion allowance and fluid chemistry

Valve Selection Logic

Selection should be based on ANSI pressure class, body metallurgy, bore requirement, differential pressure, operating temperature, cycling frequency and compatibility of RPTFE/FKM with the process medium. For actuated valves, actuator torque must be checked against maximum differential pressure and seat breakaway torque.

FAQ

Can the Series 68 be used for throttling?
No. It is an isolation ball valve. Continuous partial opening can damage seats and increase leakage risk.

Which version is used for corrosive service?
68J is suitable for many stainless-steel applications. 68R should be considered for more aggressive chloride or corrosive duties where super duplex material is required.

Can it be automated?
Yes. ISO F04–F12 mounting pads support pneumatic or electric actuators, subject to torque verification.