Vacuum Fitting KF25 Flange to 1 in. Male Threaded Adapter Stainless Steel

Vacuum Fitting KF25 (NW25) Quick-Flange to 1 in. Male NPT Threaded Adapter – 304 Stainless Steel (Similar to Ideal Vacuum P101605)

This heavy-duty KF25 (NW25) to 1 in. Male NPT adapter is a precision-machined stainless steel vacuum fitting engineered to connect standard quick-flange ISO-KF vacuum components directly to female threaded piping, valves, manifolds, or pump ports. Equivalent in design and function to Ideal Vacuum part number P101605, this fitting features an ISO-KF25 flange on one end and a 1 in. male National Pipe Taper (NPT) thread on the other. Precision-crafted from high-purity 304 stainless steel, it delivers high corrosion resistance, exceptional structural strength, and reliable vacuum-tight performance across roughing, medium, and high-vacuum lines down to 10^-8 Torr.

Technical Performance and Structural Design

• 304 Stainless Steel Construction: Machined from solid, high-purity 304 stainless steel stock for maximum mechanical strength, chemical durability, and long-term resistance to outgassing and corrosion.

• Standard ISO-KF25 Quick-Flange Interface: Conforms to ISO-KF (NW25) dimensional standards, pairing seamlessly with standard KF25 centring rings, elastomeric O-rings (Viton/FKM or Buna-N), and quick-release wing-nut clamps for rapid assembly and teardown.

• 1 in. Male NPT Tapered Thread: Cut with precise 1 in. male NPT threads to form a tight mechanical seal when mated with standard female 1 in. threaded vacuum ports, pipe fittings, or system manifolds (recommended for use with PTFE tape or vacuum-compatible thread sealant).

• High-Vacuum Capability: Suitable for foreline plumbing, roughing pump connections, vacuum chambers, and process lines operating from atmospheric pressure down to high vacuum ranges (10^-8 Torr).

Product Specifications

• Part Number / Cross-Reference: Similar / Equivalent to Ideal Vacuum P101605

• Flange Size & Style: KF25 (NW25 / ISO-KF Flange)

• Thread Specification: 1 in. Male NPT (National Pipe Tapered)

• Material Composition: 304 Stainless Steel

• Vacuum Rating Range: Roughing vacuum down to High Vacuum (10^-8 Torr)

• Temperature Operating Limits: Dependent on elastomer sealing ring chosen (up to 150 C with Viton / FKM O-rings)

• Surface Finish: Precision-turned smooth sealing face for reliable O-ring compression

Key Benefits and Applications

• Vacuum Pump & Line Adaptability: The standard solution for connecting KF25 quick-flange lines directly to rotary vane pumps, dry scroll pumps, or exhaust plumbing featuring 1 in. female NPT ports.

• System Integration & Plumbing Transitions: Bridges the gap between quick-disconnect ISO-KF laboratory vacuum hardware and industrial NPT threaded pipe manifolds or isolation valves.

• Reusable & Low-Outgassing Component: Solid stainless steel build allows repeated installation and removal across different vacuum chamber configurations without thread galling or surface deformation.

All product names, logos, and brands are property of their respective owners.