Installation

Figure 1-1. Speed and Throughput Curves – HS-20 Diffusion Pump

1-3

PHYSICAL SPECIFICATIONS (See Figure 1-2)

 

 

 

Flange dimensions (inches):

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

ASA

 

ISO 630k

ISO 160k

 

 

 

Inlet

 

Foreline

Inlet

Foreline

OD

 

 

27.50

 

9.0

27.17

7.09

 

ID

 

 

21.25

 

5.06

21.25

5.06

 

Thickness

 

1.12

 

0.75

0.78

0.47

 

Bolt Circle

 

25.0

 

7.5

 

 

 

 

 

 

 

No. of Holes

 

20.0

 

8.0

Requires NW-630

Requires NW-160

 

Size of Holes

 

1.25

 

0.75

 

 

 

 

 

 

 

Centering Ring (not

Centering Ring (not

 

Orientation

 

Straddle center line

 

included with pump)

included with pump)

 

Gasket Groove ID

 

21.625

 

5.31

 

 

 

 

wide

 

0.48

 

0.375

 

 

 

 

deep

 

0.25

 

0.09

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

 

Height

48 inches; allow additional

 

8 inches (min) for heater removal

Jet Assembly 5-stage, Self-aligning, fractionat- ing design with four diffusion stages and one ejector stage

Foreline

Stacked disk and ring

Baffle

 

 

Cold Cap

Water-cooled

Water

14

FPT body and foreline

Connections

38

quick cool coils

Thermal

Upper set at 185°F (29°C)

Switches

Lower set at 390°F (93°C)

Materials

Body: Mild steel

 

Flanges: Mild steel

 

Jet Assembly: Aluminum

 

Foreline Baffle: Stainless Steel

 

Cooling Coils: Copper

 

Quick Cool Coils: Stainless Steel

 

Cold Cap: Copper (Nickel-plated)

Weight

500 pounds

Shipping

580 pounds

Weight

 

1-2

Page 17
Image 17
Bissell HS-20 instruction manual Asa