Siemens CA 333 Series - Manuals

Page 2 - TABLE OF CONTENTS; SECTION AND TITLE

SD74 2 TABLE OF CONTENTS SECTION AND TITLE PAGE 1.0 INTRODUCTION .................................................................................................................................................4 1.1 MODEL DESIGNATION .....................................................................

Page 3 - LIST OF ILLUSTRATIONS; FIGURE AND TITLE; LIST OF TABLESS; TABLE AND TITLE; Cover banner updated manual revision number and date changed.

SD74 3 LIST OF ILLUSTRATIONS FIGURE AND TITLE PAGE 2-1 Installation Dimensions ........................................................................................................................................10 2-3 Rotary Range Spring Kit Assembly and Parts List .................................

Page 8 - free piping may be used. When making pneumatic; CAUTION; Pressure in excess of 150 psig; INSTRUMENT AIR REQUIREMENTS; and stainless steel.

SD74 8 2.0 INSTALLATION See Figure 2-1 for mounting dimensions and connections. The two basic mounting positions of the positioner are normal, where the nameplate is on the bottom, and inverted, where the nameplate is on top. Valve design and desired valve position when the input is at maximum deter...

Page 10 - FIGURE 2-1 Installation Dimensions

SD74 10 6 PSI INSTR. PRESS. SPAN. 12 PSI INSTR. PRESS. SPAN 15 PSI INSTR. PRESS. SPAN 24 PSI INSTR. PRESS. SPAN 30 PSI INSTR. PRESS. SPAN Stroke “C” Dim. Stroke “C” Dim. Stroke “C” Dim. Stroke “C” Dim. Stroke “C” Dim. 1/4 to 1-1/2 1-1/2 1/4 to 1-1/2 1-5/16 1/4 to 1-1/2 1-9/32 1/4 to 1-1/2 1-17/32 1/...

Page 14 - FIGURE 2-5 Mounting Plate; Place the suppression spring on the housing.; NOTE

SD74 14 4. Place range spring assembly on actuator shaft. 5. Attach the range spring link to the input diaphragm assembly stem (See Figure 4-1). 6. Align the split clamp so that its slot is 90° from the slot in the range spring assembly. Tighten slightly. 7. Position the traveling washer on the span...

Page 18 - acting positioner applies also to the single; FIGURE 4-1 Valve Positioner Schematic; he input diaphragm assembly.

SD74 18 On spring-loaded and cushion-loaded operators, only one of the positioner outputs is used; the other is p l ugged. The Model 74 is then a single-acting positioner, working against the operator spring force or cushion load. The previous principle of operation describing the double - acting po...

Page 19 - FIGURE 4-2 Motion Transmitter Schematic

SD74 19 FIGURE 4-2 Motion Transmitter Schematic 5.0 MAINTENANCE A spring return pushbutton restriction cleaner is built into the body of the valve positioner. Push this button to clear the restriction and eliminate problems caused by build-up on the restriction. Pushing the button will not interrupt...

Page 20 - Plungers – The plungers differ in shape, as shown in this figure.; FIGURE 5-1 Parts Comparison Models 74 and 74S

SD74 20 • Plungers – The plungers differ in shape, as shown in this figure. • Diaphragm Rings – The Model 74S diaphragm ring has a nozzle. The Model 74 ring does not. • Diaphragm Assemblies – The Model 74S has a diaphragm spacer with a small hole drilled in it, as shown by the cutaway view in this f...

Page 21 - DISASSEMBLY; If it is necessary to disassemble the positioner, refer

SD74 21 5.1 DISASSEMBLY If it is necessary to disassemble the positioner, refer to Parts List No. 12372PL and proceed as follows: 1. Remove the pilot plunger sealing screws, plunger springs and plungers. 2. Remove the six body screws and separate the upper and lower housings. 3. Pull the baffle and ...

Page 23 - Model Series 74 H/FR Valve Positioners; IMPORTANT

SD74 23 6.0 PARTS LIST Model Series 74 H/FR Valve Positioners Drawing No. 12372PL 11/94 Supersedes 1/88 IMPORTANT Service Parts Kits are available for servicing the instrument. Contact Siemens for available kits; refer to the Customer/Product Support section of this instruction. Some parts in this P...

Page 25 - As Req’d; N SG SN

SD74 25 Symbol Part No. Description Req’d 40 14923-52 Mounting Plate (not shown) As Req’d 41 14923-49 Enclosure (not shown) 1 A 1-0265 2-56 x 1/4 Rd. Hd. 2 B 1-2565 10-32 x 7/8 Rd. Hd. 6 C 1-2450 10-32 x 9/16 Fill. Hd. 4 D 1-2550 10-32 x 7/8 Fill. Hd. 2 E 1-7216 #2 Med. Lwr. 2 F 1-7288 #10 Med. Lwr ...