3-way plug valve 11b18bk for pressure gauge with handle Pn 25

The 11b18bk Three-way Machined Brass Taper Valve with Handle PN 25 is a heavy-duty, high-precision industrial plumbing component designed for connecting, testing, purging, and replacing industrial pressure gauges, vacuum gauges, signaling pressure gauges, and other pressure-sensing instruments without interrupting the ongoing technological process.

The paramount advantage of this specific model is its enhanced nominal pressure rating of PN 25 (25 bar). Unlike standard PN 16 alternatives, this brass valve features thickened walls and a reinforced stem, ensuring an increased safety margin. This makes it an ideal choice for high-pressure industrial lines, steam systems, thermal power plants, gas distribution networks, and heavy engineering applications where durability and reliability under pressure fluctuations are strictly required.

Three-Way Functional Capabilities

The specialized three-way fluid path design allows the plant operator to effortlessly perform three vital operational tasks:

1. Normal Measurement Mode: Direct continuous connection between the process pipeline and the pressure gauge for active monitoring.

2. System Purging: Venting residual pressure, blowing out debris, and removing trapped air or condensation before the gauge to ensure pristine accuracy.

3. Isolation & Maintenance: Completely shutting off the medium supply to the gauge, enabling safe decommissioning, calibration, inspection, or rapid replacement of a faulty device.

The valve body, stem, and handle are precision-machined from high-grade CW617N / LS59-1 brass, which provides outstanding structural integrity, resistance to dezincification, and atmospheric corrosion protection. Zero-leakage sealing performance (Class "A" airtightness) is guaranteed by premium-grade PTFE (Polyflon) gaskets. The valve effortlessly handles steam, hot/cold water, natural gas, and other non-aggressive liquid or gaseous media at operating temperatures up to 200 °C.

Connection Type: Female thread G 1/2" (to pipeline), M20x1.5 (to gauge)

Installation & Maintenance Guidelines

The 11b18bk three-way valve must be installed strictly in a vertical position directly preceding the pressure gauge. When assembling threaded joints, the use of appropriate sealing materials (PTFE tape or industrial flax with sealing paste) is mandatory. To eliminate piping stress, the valve must not be subjected to structural loads (bending, twisting, compression, or severe vibration) from the pipeline. For optimal lifespan and to prevent the taper plug from sticking or seizing due to prolonged immobility, a routine maintenance cycle of opening and closing the valve should be conducted at least once a month.