EFAR WK8a/WK8c
SubCategory: BallValves
Manufacturer: EFAR
Industry:
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Product features
- Reduced-bore flow path → Provides a compact isolation solution where full-bore passage is not required.
- WK8a flanged version → Supports bolted installation in standardized flanged pipework.
- WK8c weld-end version → Provides an alternative for permanently welded gas and process lines.
- Floating-ball construction → Uses a proven quarter-turn principle for reliable open/closed isolation.
- DN15-DN150 range → Covers common small and medium process-pipeline sizes.
- 1.6-2.5 MPa published pressure range → Supports multiple Group 1 duties when the correct size and configuration are selected.
- -30 to +110 °C published range → Covers a broad range of gas and petrochemical operating conditions.
- PN-EN 1092-1 flanged connections → Supports integration into standardized European piping systems.
- Defined installation-length standards → Helps engineers plan layouts, replacements and maintenance access.
- AxFlow technical support → Helps verify medium classification, pressure, temperature, connections and spare-parts needs before ordering.
EFAR WK8a/WK8c ball valves are intended for on/off isolation of gas, petroleum-derived substances, formation water and other Group 1 fluids covered by the Pressure Equipment Directive 2014/68/EU. The family is relevant to gas, fuel and petrochemical pipework where a compact quarter-turn valve and a choice of flanged or welded installation are required. Correct specification is important because Group 1 media demand careful checking of pressure, temperature, connection and safety requirements.
WK8a is the flanged version and WK8c the weld-end version. EFAR specifies a reduced-bore flow path and floating-ball construction for the family. Flanged connections are according to PN-EN 1092-1, flanged face-to-face dimensions follow PN-EN 558-1, and weld-end installation lengths are specified according to PN-EN 12982.
The current WK8a/WK8c range covers DN15 to DN150. For Group 1 duties, EFAR publishes working pressures from 1.6 to 2.5 MPa and an operating temperature range from -30 to +110 °C. These figures define the published family envelope, but the final selection should always be checked against the exact fluid, pressure-temperature relationship, project classification and connection requirements.
Reduced-bore construction can provide a compact isolation solution where full-bore passage is not required, while the quarter-turn mechanism supports fast and clear open/closed operation. Selecting the right end connection and duty rating at the outset helps control installation work, maintenance effort and replacement risk over the valve lifecycle. AxFlow can help identify the correct EFAR configuration, check technical requirements and support service and spare-parts planning; contact AxFlow for product selection and availability.
