INDUSTRY COMPONENT

Inner Door

A critical sealing component in Rapid Transfer Ports (RTP) that maintains sterile isolation during material transfer in aseptic manufacturing.

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Component Specifications

Definition
The Inner Door is a precisely engineered, circular or rectangular component that forms the interior sealing surface of a Rapid Transfer Port (RTP) system. It is designed to mate with the outer door (or alpha/beta port interface) to create a hermetically sealed barrier, preventing contamination ingress or egress during the transfer of materials between two controlled environments, such as isolators, cleanrooms, or containment systems. It typically features a robust sealing mechanism (like a double O-ring or gasket system), a locking mechanism, and is often equipped with sensors to verify proper closure and seal integrity.
Working Principle
The Inner Door operates on a pressure-sealing principle. When engaged with the mating outer door, a controlled clamping force is applied, compressing the sealing gaskets to form a leak-tight barrier. This maintains differential pressure and sterility. During transfer, the doors are locked together, the seal is verified, the inter-space is sterilized (e.g., via VHP, steam, or radiation), and then both doors open simultaneously to allow material passage without breaching the sterile boundary of either side.
Materials
Stainless Steel (typically 316L or 304L, electropolished), with sealing elements made of FDA/USP Class VI compliant elastomers (e.g., silicone, EPDM, FKM/Viton) or PTFE. Surfaces are often passivated for corrosion resistance and smoothness to prevent microbial adhesion.
Technical Parameters
  • Sensors Position sensors, pressure sensors for seal verification
  • Diameter Commonly 200mm, 300mm, 400mm (or rectangular variants)
  • Seal Type Double O-ring, inflatable gasket, or magnetic seal
  • Surface Finish Ra ≤ 0.8 μm (electropolished)
  • Pressure Rating Typically -1 to +0.5 bar (gauge)
  • Locking Mechanism Manual clamp, pneumatic, or motorized
Standards
ISO 10648-2, ISO 14644, DIN 28400, ASME BPE

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Inner Door.

RTP inner door rapid transfer port component aseptic transfer system sterile barrier door pharmaceutical equipment isolator door containment door double O-ring seal Inner Door Inner Door in Machinery and Equipment Manufacturing

Parent Products

This component is used in the following industrial products

Rapid Transfer Port (RTP)

A sealed interface for transferring materials into/out of aseptic barriers while maintaining sterility.

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Engineering Analysis

Risks & Mitigation
  • Seal failure leading to contamination
  • Mechanical failure preventing door operation
  • Improper sterilization of the interface
  • Material incompatibility causing degradation
FMEA Triads
Trigger: Gasket wear, tear, or improper installation
Failure: Loss of seal integrity, leading to microbial or particulate contamination
Mitigation: Regular preventive maintenance, replacement of seals per schedule, use of redundant seals, and integrity testing before each use.
Trigger: Corrosion or pitting of metal surfaces
Failure: Compromised seal surface, potential for biofilm formation
Mitigation: Use of corrosion-resistant materials (316L SS), proper passivation, and adherence to cleaning protocols.
Trigger: Mechanical misalignment or damage to locking mechanism
Failure: Inability to achieve proper clamping force, leading to incomplete seal
Mitigation: Regular calibration and inspection of mechanical components, use of alignment guides, and sensor-based verification of lock status.

Industrial Ecosystem

Compatible With

Interchangeable Parts

Compliance & Inspection

Tolerance
Dimensional tolerances per ISO 2768-mK, seal compression tolerance typically ±10% of specified compression force
Test Method
Pressure decay test (e.g., ASTM F2338), bubble test, microbial challenge test, helium leak test for high integrity applications

Buyer Feedback

★★★★☆ 4.8 / 5.0 (10 reviews)

"Impressive build quality. Especially the technical reliability is very stable during long-term operation."

"As a professional in the Machinery and Equipment Manufacturing sector, I confirm this Inner Door meets all ISO standards."

"Standard OEM quality for Machinery and Equipment Manufacturing applications. The Inner Door arrived with full certification."

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Frequently Asked Questions

What is the main function of the RTP Inner Door?

Its primary function is to provide a sterile, leak-tight seal on one side of an RTP system, enabling the safe transfer of materials between two separate controlled environments without cross-contamination.

How is seal integrity verified on an Inner Door?

Integrity is typically verified via pressure decay tests, sensor feedback (position/pressure), and sometimes integrated pressure hold tests within the RTP system's control logic before and after transfer cycles.

Can Inner Doors be customized for different applications?

Yes, they can be customized in size, material (e.g., Hastelloy for corrosive applications), seal type, and integration with specific automation or sensor systems based on process requirements.

Can I contact factories directly?

Yes, each factory profile provides direct contact information.

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Inner Core Inner Helical Ribbon / Paddle