Model 20 High Temperature Valve Specifications - Siemens Maxum II PD PA AP Service Manual

Valves
4.5 Model 20 HT Valve
9. Referring to the following screw tightening rotation sequence, securely tighten the three
Allen screws (35), that connect the valve cap (32) to the valve plunger body (17). One at
a time, tighten each screw to first torque. Then continue with the next torque value until
the final value is reached.
a. Finger tighten
b. 20 inch-pounds (2.3 Nm)
c. 40 inch-pounds (4.5 Nm)
d. 60 inch-pounds (6.8 Nm)
10.Tighten the three Allen screws (16) that secure the plunger valve body (13) to the cylinder
base (14) to approximately 30 to 40 inch-pounds (3.4 to 4.5 Nm).
BE CERTAIN ALL ALLEN SCREWS ARE SECURELY TIGHTENED. DO NOT
OVERTIGHTEN.
4.5.12

Model 20 High Temperature Valve Specifications

Internal loop sample size:
External loop sample size:
Sample filter:
Maximum operating temperature:
Maximum leak rate between ports:
Material in contact with sample:
Connection size and type:
Actuating air:
Total switching time:
Body size:
Mounting:
Other:
80
2 μl standard. (Other sizes are available on special request.)
170 μl standard. (Other sizes are available on special request.)
5 μm recommended (not furnished with valve).
150°C (300°F) at 3450 kPa (500 psig) maximum standard
234°C (450°F) at 690 kPa (100 psig) maximum for special applications
Less than 1 μl per minute between ports.
316 stainless steel. Other materials are available on special request.
1.6 mm ( / ") O. D. tubing, with Swagelok® fittings
1
16
345 kPa (50 psig) instrument air standard. 550 kPa (80 psig) required for oper‐
ating pressure above 1380 kPa (200 psig). Helium or nitrogen may be substituted
for air.
150 ms (total time from initiation of command signal to completion of change in
valve state)
70 mm (2 / ") diameter by 70 mm (2
3
4
Clamp type
A helium, hydrogen, or nitrogen purge may be used (an external supply of low
pressure helium is required).
/ ") height
3
4
Maxum II Valves and Oven Components
Service Manual, 10/2018, A5E42019844001