Bulkhead Tube-to-Tube Weld Fitting TTPB

Bulkhead Tube-to-Tube Weld Fitting TTPB

Similar to Swagelok's VCR, Parker's VacuSeal, and Fujikin's UJR series fittings, the NPT Male Thread VCR Elbow VCME is widely used in semiconductor manufacturing, solar energy, nuclear energy, LED, TFT-LCD, petrochemical, and biopharmaceutical industries due to its ultra-cleanliness, high precision, leak-free performance in both vacuum and high-pressure conditions, and long service life. It plays a critical role in the delivery of ultra-clean gases (specialty gases). Depending on process requirements, customers can choose between BA-grade and EP-grade finishes. We also offer three material options to meet different cleanliness standards: 316L, 316L VAR (single V), and 316L VIM+VAR (double V).

Features of VCR Fittings:

Ultra-high cleanliness – Standard surface polishing achieves an average roughness of Ra 10 µin (0.25 µm), with Ra 5 µin (0.13 µm) available as an option.

Exceptional sealing – Metal face seal ensures leak-free performance from vacuum to high-pressure conditions.

Wide temperature resistance – Metal gaskets can withstand temperatures up to 537°C (with SS316L gaskets).

Extended service life – Internal threads of the nut are silver-plated to prevent wear.

Enhanced safety – Each nut features a test port for easy leak testing after assembly.

Space-saving design – Requires minimal space for installation and disassembly.

Strict Manufacturing Process:

Raw material inspection → Fitting machining → Mechanical polishing → Repeated cleaning → Electrolytic polishing → Passivation → Rinsing + Drying
Final cleaning and packaging are completed in a cleanroom environment, ensuring ultra-clean delivery.

Structure & Working Principle:

A VCR fitting typically consists of five components:

• Two tube ends

• One male-threaded (external) nut

• One female-threaded (internal) nut

• One gasket

• 
  

Sealing Mechanism:
The male and female nuts are tightened to compress the metal gasket, causing slight deformation for a secure seal.

• For SS316L stainless steel or nickel gaskets: Tighten the female-threaded nut 1/4 turn with a wrench after securing the male-threaded nut.

• For copper gaskets: Only 1/8 turn is needed.

Note: Gaskets are single-use consumables and should not be reused.

For more selection details, please call: 021-57712303