Adapter KF-25 to Welch Vacuum Pump Inlet or Outlet (New Style), 1376, 1380, 1402, 1405, Thread Size 1-20, Aluminum. 1393G

These adapters are KF-25 to Welch vacuum pumps Inlet or Outlet, models 1376, 1380, 1402, 1405, New Style Pumps. The flange size ISO-KF NW-25 to Welch pump thread size 1-20. They are commonly used to make connections between Welch vacuum pumps and ISO-KF Flanges. The ISO-KF flanges are often called quick flange fittings because they are quick to assemble. A circumferential clamp and centering ring form the vacuum seal between the connecting flanges (please see top right figure - click to enlarge). The centering ring contains a rubber elastomer o-ring. The standard sizes for quick flange fittings are KF-10, KF-16, KF-25, KF-40, and KF-50 with flange sizes NW-10, NW-16, NW-25, NW-40, and NW-50, respectively. They are made of corrosive resistant Aluminum.

Adapter KF-25 to Welch vacuum pumps (New Style), models 1376, 1380, 1402, 1405,
ISO-KF Flange Size: NW-25
Thread Size: 1-20 NPSM
Common Dimensions: A = 1.2 in.

FOR NEW STYLE WELCH VACUUM PUMPS
A New Style Pump has an oil sight glass that is pressed into the body, click on far right picture for example of a new style pump. FOR Welch 1405 pumps with S/N greater than >77703 OR Welch 1380 S/N greater than >2114, OR Welch 1402&1402N S/N greater than >133218, OR Welch 1376&1376N S/N greater than >14594. Welch Part Number 1393G.