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KF (QF) to Welch Pump Adapters

KF (QF) to Welch Pump Adapters

KF (QF) to Welch Pump Adapters are designed to connect KF (Quick Flange) vacuum fittings to Welch vacuum pumps, ensuring a secure and reliable vacuum seal. These adapters provide seamless integration between KF flange-based systems and Welch pump inlet or outlet ports.

Key Features

  • Material: Manufactured from high-quality 304 or 316L stainless steel for durability and corrosion resistance.

  • Vacuum Compatibility: Suitable for high-vacuum and ultra-high vacuum (UHV) applications.

  • Precision Machining: Ensures a leak-tight connection between KF flange components and Welch pump ports.

  • Quick Installation: Easily connects using KF clamps and centering rings for a secure fit.

  • Available Sizes: Compatible with KF10, KF16, KF25, KF40, and KF50 flange sizes to match Welch pump inlet sizes.

Applications

  • Vacuum Pumping Systems: Ideal for connecting Welch pumps to vacuum chambers, filtration systems, and analytical instruments.

  • Laboratory & Research Use: Used in scientific experiments, thin film deposition, and material processing applications.

  • Industrial & Manufacturing: Commonly used in semiconductor fabrication, metallurgy, and chemical processing.

Why Choose TFM’s KF to Welch Pump Adapters?

  • Precision Engineering: Designed for optimal vacuum performance with minimal leakage.

  • Wide Compatibility: Ensures easy integration with standard KF vacuum systems and Welch pumps.

  • Robust Construction: Provides long-lasting performance even in demanding vacuum environments.

For more details or to place an order, visit TFM’s website.

Ordering Table

Flange Size/OD Type Drawing Thread Size Fitting Part Number
KF16 (1.18" OD) New-Style Tooltip 3/4-20 Welch: 1399, 1400, 1405 (Old Style) QF16-075-W1N
KF16 (1.18" OD) Old-Style Tooltip 5/8-18 Welch: 1399, 1400, 1410 QF16-075-WP1
KF16 (1.18" OD) Old-Style Tooltip 3/4-20 Welch: 1405 QF16-075-WP2
KF25 (1.57" OD) New-Style Tooltip 1-20 Welch: 1373, 1376, 1380, 1402, 1405 QF25-100-W1N
KF25 (1.57" OD) Old-Style Tooltip 1-20 Welch: 1380, 1402, 1403, 8806, 8811, 8816, 8821 QF25-100-WP1
KF40 (2.16" OD) New-Style Tooltip 1-3/4-20 Welch: 1397 QF40-150-W2N
KF40 (2.16" OD) Old-Style Tooltip 1-1/2-20 Welch: 1373, 1376, 8831 QF40-150-WP1
KF40 (2.16" OD) Old-Style Tooltip 1-3/4-20 Welch: 1374, 1397, 8851 QF40-150-WP2

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FAQ

Tube fittings are designed for tubes (measured by outside diameter and wall thickness) used in high-pressure and instrumentation applications, whereas pipe fittings are for pipes (identified by nominal pipe size) primarily used in fluid transport.

 

Common valve types include ball valves, gate valves, check valves, butterfly valves, and globe valves. Each serves a specific function—from quick shutoff (ball/gate valves) to flow regulation (globe valves).

 

  • For tubing, measure the outside diameter; for pipes, refer to the nominal pipe size (using conversion charts if needed). Always match the valve or fitting size to your pipe’s dimensions and flow requirements.

  • Frequently used thread types include NPT (National Pipe Tapered), BSP (British Standard Pipe), and UNC, along with slip-fit options that rely on compression or fusion rather than threads.

Interchangeability depends on manufacturer specifications and certification. Always verify compatibility via manufacturer guides or certified interchangeability charts.

 

  • A coupling is a short, straight fitting used to join two pipes or tubes. It provides a secure, leak-tight connection and can sometimes serve to extend or repair piping runs.

Consider valve type, pressure and temperature ratings, material compatibility with your fluid, actuation method (manual or automatic), and maintenance requirements.

 

  • Valves regulate flow by opening, closing, or partially obstructing the pathway. Their mechanisms (such as the rotation of a ball or the linear movement of a gate) determine the speed and precision of flow control.

  • A flange is a flat, circular component used to connect pipes, valves, or other equipment. Bolted together with gaskets, flanges provide a secure, leak-proof joint that facilitates both assembly and maintenance.

  • Manual valves require physical operation via handles or levers, whereas actuated valves use mechanisms—pneumatic, electric, or hydraulic—to open and close automatically or remotely.

  • Issues include leaks caused by improper installation, over-tightening, degraded seals, material incompatibility, and fatigue from repeated cycling. Regular inspection and proper installation practices help mitigate these problems.

Regular maintenance involves periodic inspections, cleaning or replacing worn seals, ensuring proper torque during installation, and adhering to manufacturer guidelines and local plumbing codes to preserve system integrity.

 

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