Inox-val 2 Piece Ball Valves - 704000 | Valpres

Valpres 704000 Ball Valve

Two-piece stainless steel ball valve in ASTM A351 CF8M with ISO 228-1 threaded ends. It is used for on/off isolation in small threaded process, utility, HVAC and auxiliary lines.

Technical Data

• Sizes: 1/4” to 2”
• Pressure rating: PN64 up to 1/2”, PN40 from 3/4” to 1”, PN25 from 1 1/4” to 2”
• Temperature range: -20°C to +160°C
• Vacuum service: 10⁻² torr
• Body / end connection: ASTM A351 CF8M
• Ball: ASTM A479 TP316 or ASTM A351 CF8M
• Stem: ASTM A479 TP316 or 17-4PH
• Seats / thrust washer: PTFE
• O-ring: FKM
• Handle: stainless steel AISI 430

Applicable Standards and Material Basis

• Thread form: ISO 228-1 parallel pipe thread
• Pressure classes: PN64, PN40 or PN25 depending on valve size
• Pressure-retaining casting material: ASTM A351 CF8M
• Internal stainless parts: TP316, CF8M or 17-4PH depending on component
• Certificates such as EN 10204 3.1, PED assessment or special documentation should be confirmed at procurement stage if required by the project specification.

Typical Applications and Media

The 704000 is suitable for isolation of water, compressed air, neutral gases, compatible chemical liquids and auxiliary plant services. Use in steam or aggressive chemical duty requires verification of pressure, temperature and compatibility with CF8M, PTFE and FKM.

Operating and Selection Notes

• Use as an isolation valve; ball valves are not intended for continuous throttling service.
• For sizes above 1/2”, account for the reduced pressure rating from PN64 to PN40 or PN25.
• PTFE seats provide soft-seat shutoff; contamination, crystallising fluids or abrasive solids can increase leakage risk and operating torque.
• FKM O-rings require chemical compatibility review, especially for solvents, amines, hot water and steam-condensate mixtures.

Variant Differences

• Main difference by size is the pressure class: PN64, PN40 or PN25.
• Ball material may be TP316 or CF8M depending on execution.
• Stem material may be TP316 or 17-4PH; confirm when chloride exposure, torque margin or documentation is critical.

Actuation and Maintenance

The standard configuration is lever operated. If remote operation is required, select an actuated execution or verify actuator interface, stem torque, cycle frequency and fail position with the manufacturer. Periodic inspection should focus on stem leakage, seat tightness and thread joint integrity.

FAQ

• Is it suitable for threaded stainless pipework? Yes, when ISO 228-1 parallel thread connections are specified.
• Can it be used for vacuum? The stated vacuum capability is 10⁻² torr, subject to seal condition and correct installation.
• What limits chemical service? Compatibility with CF8M stainless steel, PTFE seats and FKM elastomer seals.
• What is the key sizing issue? The pressure rating decreases as size increases, so the selected size must be checked against design pressure and temperature.