Wafer Ball Valves - 720000 Series | Valpres

Valpres 720000 Wafer Ball Valve

Full-bore wafer-type ball valve for installation between flanges in carbon steel industrial piping systems. The reduced face-to-face length is used where a compact shut-off valve is required without changing the pipeline flange arrangement.

Technical Characteristics

• Nominal sizes: DN15 to DN200
• Pressure ratings: PN16, PN20, PN40, PN50
• Flange standard: DIN or ANSI execution, depending on variant
• Body / end materials: ASTM A105, A352 LCB or LF2
• Ball materials: A351 CF8 or A479 TP304
• Stem materials: A479 TP304 / 17-4PH
• Seats: PTFE
• O-rings: FKM
• Temperature range: -20°C to +160°C
• Vacuum service: down to 10⁻³ torr

Variants and Configuration

The series includes codes such as 722000, 720009, 720007, 720010, 720015, 720043, 720060 and 720076. Differences are related to pressure class, DIN or ANSI drilling, body material, dimensional execution and optional construction requirements.

Typical Applications

• Fuel gas and methane shut-off lines
• Industrial fuel systems
• Water and service water circuits
• Compressed air headers and branch lines
• Industrial liquid services compatible with carbon steel, PTFE and FKM
• Compact isolation duties in skids, manifolds and process packages

Operational Considerations

The full-bore design limits pressure drop compared with reduced-port valves and allows easier pigging or line flushing where the piping layout permits. The wafer body reduces installed length compared with a full-body flanged ball valve, but flange alignment and bolt loading must be controlled during installation.

Actuation Options

Manual operation is typically by lever or gear operator, depending on DN and operating torque. For automated isolation or on/off control, pneumatic or electric actuators may be specified when the valve configuration includes a suitable mounting arrangement. Actuator sizing should consider differential pressure, media condition, cycle frequency and safety position requirements.

Sealing and Leakage Notes

PTFE seats provide tight shut-off for compatible clean services within the stated temperature range. FKM O-rings require chemical compatibility verification, especially for aromatic fuels, aggressive additives, high-temperature oils or vacuum duty. Seat wear, solids in the line and thermal cycling affect leakage performance and maintenance intervals.

Selection Criteria

• Confirm DN, PN or ANSI class and flange standard.
• Check body material against fluid, temperature and corrosion allowance.
• Verify PTFE and FKM compatibility with the process medium.
• Assess whether fire-safe execution, antistatic design or certification is required by the plant specification.
• Compare wafer construction with a full flanged ball valve when pipe stress, maintenance access or spacer length is critical.

FAQ

When is the 720000 wafer type selected?
When a compact carbon steel full-bore isolation valve is required between existing flanges and a shorter face-to-face dimension is preferred over a conventional flanged body.

Can it be used for control service?
It is primarily an isolation valve. Throttling service should be avoided unless the application has been checked for seat erosion, cavitation, noise and partial-opening stability.

Which standards must be checked?
Review the applicable DIN or ANSI flange standard, pressure class, material ASTM references and any project-required documentation such as pressure testing, fire-safe compliance or material certificates.