NTDC Pressure-Tight Valve

Categories Special Applications, Special Applications - MANDK

NTDC Pressure-Tight Valve

Manual pressure-tight end closure for hermetic separation of round sections. Resistant to seismic events, radiation, high pressure, and high air flow velocities. Can be used as a manual hermetic seal for gases and liquids.

Product Description

Key Features & Benefits

Manual Hermetic Seal
Provides complete airtight closure for round ducts with screw-shifted blade mechanism.
Extreme Condition Resistant
Withstands 10 kPa pressure, 25 m/s airflow, seismic events, and 10 kGy radiation.
Maintenance-Free Design
Screw-shifted mechanism and robust construction require no regular maintenance.
Halogen-Free Materials
Non-metallic components have minimal halogen content for sensitive environments.
Decontaminable Construction
Designed for cleaning in radioactive, chemical, or biological containment areas.
40-Year Guaranteed Life
Long service life guaranteed under prescribed operating conditions.

Technical Specifications

Dimensions & Design

Shape: Round design with round blade section. Size: Custom per EN 1092-1 flanges.

Construction & Materials

Materials: Stainless steel, painted carbon steel, or combination. Build: Welded, axial blade movement.

Performance

Pressure: 10 kPa difference. Velocity: 25 m/s tested. Leakage: 10 l/h.m² (both sides).

Operation

Type: Manual only. Mechanism: Screw-shifted blade. Maintenance: Free design.

Environmental Resistance

Radiation: ≥10 kGy. Seismic: Resistant. Decontaminable: Yes. Halogen: Minimal content.

Durability

Service Life: 40 years guaranteed. Condition: Under prescribed operating parameters.

Installation & Integration

Flange Mounting

Bolts directly to standard EN 1092-1 flanges at the end of round duct sections.

Manual Operation Setup

Simple screw mechanism for manual opening/closing; no power or control wiring needed.

Seismic & Pressure Ready

Installation must account for seismic loads and pressure forces on the closure.

Decontamination Access

Installed in accessible locations for periodic decontamination procedures.

End-of-Line Installation

Used as a terminal closure on ducts, pipes, or access ports in containment systems.