PTFE Key Stopcock T Bore – Advanced 3-Way Fluid & Gas Routing
The SGC LABS® PTFE Key Stopcock T Bore is specifically engineered for multi-port laboratory applications requiring absolute purity and versatile directional control. Traditional 3-way glass stopcocks rely heavily on hydrocarbon greases to seal their complex channels, which risks dissolving into organic solvents or tracking contaminants into your system. With our self-lubricating, non-stick Teflon (PTFE) T-bore key, you achieve an airtight, liquid-tight seal across all three ports completely grease-free.

Multi-Port Efficiency – Key Design & Flow Advantages
The unique “T” shaped channel configuration inside a high-tolerance borosilicate barrel opens up advanced system routing capabilities:

Versatile 3-Way Routing: The T-bore plug allows fluid or gas to interconnect all three ports simultaneously, or divert flow between two ports while completely isolating the third.
100% Grease-Free Performance: Eliminates sample contamination and prevents volatile gases or high-purity solvents from stripping down lubricants.
No Glass-Locking or Freezing: Ideal for systems handling highly alkaline mixtures or reactive gases that typically fuse glass-on-glass joints over time.
Superior Material Durability: The outer shell is crafted from thermal-shock-resistant Borosilicate Glass 3.3, designed with thick walls to withstand structural tension in complex multi-tube manifolds.
Adjustable Sealing Nut: A finely threaded polypropylene retention cap lets you compress the taper smoothly to maintain full vacuum or positive pressure seals.

Key Features

Material (Body): Borosilicate Glass 3.3 – highly chemically inert and thermally stable
Material (Plug): Pure PTFE (Teflon) – self-lubricating, non-wetting, and structurally durable
Bore Type: T-Bore configuration (3-way intersecting flow path)
Available Bore Diameters: 2.0mm, 3.0mm, 4.0mm, and 6.0mm
Retention System: Threaded PP screw nut with backing washer and micro-cushioning ring
Thermal Threshold: Glass body safe up to 500°C; PTFE key stable up to 250°C
Compliance Standards: Generally conforms to ISO 4785 / DIN 12541 structural guidelines

T-Bore vs Straight Bore Stopcocks – Application Comparison

Feature / Capability
T-Bore (3-Way) Stopcock
Straight Bore (2-Way) Stopcock

Number of Ports
3 Ports (Inlet, Outlet, and Diverter side-port)
2 Ports (Inlet and Outlet only)

Flow Control Type
Directional routing, mixing, and multi-line isolation
Simple On/Off and linear flow restriction

Internal Channel Geometry
T-shaped intersecting core
Single straight-through channel

Primary Use Case
Manifolds, gas purging, parallel solvent delivery
Burettes, separatory funnels, basic drainage lines

Applications

Schlenk lines, gas manifolds, and vacuum distribution systems
Fractional distillation setups requiring fraction cutting or reflux diverting
Parallel feeding lines for chemical reactors and sample extraction loops
Advanced research laboratories, organic synthesis plants, and pilot scale testing lines

Why Choose SGC LABS®?
SGC LABS® T-bore stopcocks demand an extraordinary level of manufacturing accuracy because three independent glass sidearms must perfectly align with the internal T-path of the PTFE plug. Our computer-guided grinding machines hone each piece to a 1:10 enterprise taper, ensuring zero cross-port leakage when a specific channel is closed off. Every batch is stringently pressure-tested at our facility in Ambala, India. Delivering premium-grade laboratory glass solutions since 2003.