Varian NHS-35, Instruction Manual, Page: 23 / 49

Installation
1-3
1-3 PHYSICAL SPECIFICATIONS (See Figure 1-2)
Flange dimensions (inches):
ASA
Inlet Foreline Inlet Foreline
35"ASA 6"ASA ISO-1000-F ISO-200-K*
OD 41.75 11 44.09 9.45
ID 35 7.72 35.00 7.72
Thickness 1.12 0.75 1.12 0.47
Bolt Circle 38.5 9.5 42.913 –
No. of Holes 28 8 32 –
Size of Holes 0.87 0.81 0.550 –
Orientation Straddle center line
Gasket Groove ID 35.37 8.20 40.75 –
wide 0.56 0.17 0.56 –
deep 0.25 0.09 0.25 –
Height 72.13 inches; allow additional 8 inches (min) for
heater removal
Jet Assembly 5-stage, Self-aligning, fractionating design with four
diffusion stages and one ejector stage
Foreline Baffle Stacked disk and ring
Cold Cap Water-cooled
Water Connections
3
⁄
8
FPT for pump body and quick-cool coils
Thermal Switches Upper set at 200°F (92°C)
Lower set at 600°F (315°C)
Materials
Body Mild steel
Flanges Mild steel
Jet Assembly Stainless Steel
Foreline Baffle Mild Steel
Weight 1220 pounds (pump)
250 pounds (jet assembly)
Shipping Weight 1550 pounds (705 kg)
* Requires NW-200 centering ring (not included with pump)