Hrv Valves - Siemens SINUMERIK 840D Description Of Functions

02.99
A.1.4

HRV valves

General
Features
Graphic symbol in simplified form
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P T
Fig. A-18 High-response valves
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SINUMERIK 840D/SIMODRIVE 611 digital Descr. of Functions HLA Module (FBHLA) – 04.00 Edition
HRV (High Response Valve) is a series of servo solenoid valves with excellent
dynamic and static characteristics and therefore extends the product range to
cover particularly demanding applications.
The core of the series is the size 6 valve (HRV 1), which is also used
as a pilot valve for the size 10...size 25 (HRV 2) series.
Both valve stages on pilot-actuated valves operate under position control.
In comparison to other valves, the HRV series has the following features:
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Significantly better dynamic response
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More compact dimensions
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A higher hydraulic switching capacity.
The HRV valve comprises the following components:
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Flow-force-compensated hydraulic section with wear-resistant steel sleeve
and spring centered control spool,
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Double-stroke solenoid with inductive position encoder (LVDT) and
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Integrated electronics (OBE).
High-response valves do not have the fail-safe position provided on other servo
solenoid valves. Many applications therefore require external non-return valves,
such as those available as sandwich-plate valves.
12-pin connector
Valve amplifier
Steel sleeve Valve spool
A Hydraulics
A.1 Servo solenoid valves
Double-stroke Position encoder
solenoid
A-247