219K

219K Manual pneumatic shut-off valve

219K is a manual pneumatic shut-off valve that isolates a compressed-air line and prevents the air supply from discharging through a failed downstream circuit. The unit is an independent functional component of the applicable onboard system. Selection should be based on the complete designation, working medium, setting and installation diagram rather than appearance alone.

Operating principle of 219K

The manually operated shut-off member opens or closes the internal air passage. In the closed position it separates the supply side from the downstream line; the exact handle position and port orientation must be checked against the installation drawing. Reliable operation depends on clean working fluid, the moving element, seat, springs and seals. Contamination, reversed connections or an unsuitable pressure can prevent the intended response.

Role in the aircraft system

Tu-154 technical documentation places the 219K in the air line used to pressurize the hydraulic reservoirs. On the ground-service panel it protects the air bottles against leakage if downstream check valves or lines fail. The valve works with pipelines, a pressure source, downstream equipment and the control elements of its circuit. These products are functionally related but must not be described as interchangeable merely because they operate in the same system.

Installation and maintenance checks

Before installation, verify the nameplate, ports, flow direction, internal cleanliness and seal condition. Working pressure, temperature, fluid and the prescribed functional test must come from the passport and maintenance documentation. Adjustment without approved instructions is not permitted. Incoming-inspection results should remain with the product records.

Identifying 219K for ordering

Order by the exact 219K nameplate marking. Do not confuse this pneumatic shut-off valve with cabin-pressure discharge valves or with hydraulic valves carrying similar three-digit designations. Other related products are listed in the valves category. An enquiry should state the complete designation, execution, condition, delivery set and required supporting documents.

Product Type: Manual pneumatic shut-off valve

Designation: 219K

Russian Designation: 219К

Function: isolates a compressed-air line and prevents the air supply from discharging through a failed downstream circuit

Operating Principle: The manually operated shut-off member opens or closes the internal air passage. In the closed position it separates the supply side from the downstream line; the exact handle position and port orientation must be checked against the installation drawing.

System / Applicability: Tu-154 technical documentation places the 219K in the air line used to pressurize the hydraulic reservoirs. On the ground-service panel it protects the air bottles against leakage if downstream check valves or lines fail.

Working Medium: Compressed air

Operating Pressure: Working pressure up to 150 kgf/cm² / approximately 14.7 MPa

Operating Temperature: Ambient temperature −60 °C to +60 °C

Installation: According to flow direction, port assignment and the diagram of the specific system

Ordering Check: Order by the exact 219K nameplate marking. Do not confuse this pneumatic shut-off valve with cabin-pressure discharge valves or with hydraulic valves carrying similar three-digit designations.

Documentation: Product passport, illustrated parts catalogue, system diagram and available test records

Dry Mass: Not more than 0.15 kg

Confirmed Installation: Tu-154 hydraulic-reservoir pressurization air system

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Returns & Changes (Restocking Fee)
For selected items, a RESTOCKING FEE of 10% may apply in case of return, order cancellation, or changes to the order specifications. This condition applies only to certain products and is confirmed at the order approval stage.

Warranty
All products are covered by a standard 6-month warranty.
Extended warranty is available upon request and is agreed individually; it may affect the final product price.