Introduction - Siemens SIPART PS2 series Hardware Installation Manual

3.2

Introduction

In that condition where you are using a Double Acting SIPART PS2 with a Single Acting
actuator, the following must be considered:
With loss of supply air the Double Acting SIPART PS2 will lock in the last position. This
prevents the actuator spring from returning the valve to its fail-safe position. By using the
"venting" gauge block and properly piping the positioner to the actuator the air on the side
opposite the spring can be exhausted back through the air supply line.
Figure 3-1
Specifications
Supply Pressure = 7 BAR (101.5 PSI)
Table 3- 1
Venting
Gauge
Block
Ordering Information
The booster can be ordered as a kit to add to an existing positioner in the field, or can
ordered as an option on a new unit.
Kit Numbers
6DR4004-2RF Venting Gauge Block, Double Acting, ¼" NPT connections
6DR4004-2RE Venting Gauge Block, Double Acting, G 1/4 connections
Venting Gauge Block Installation Instructions
Hardware Installation Manual, 12/2014, A5E34388399-AD
SIPART PS2 Venting Gauge Block
Weight
Makrolon
With PS2
1.7 kg (3.8 lbs) 680.39 g (1.5 lbs)
Kit only With PS2
5.3 kg (11.6
lbs)
Installing/mounting
3.2 Introduction
Explosion Proof
Kit only
680.39 g (1.5 lbs)
15