Burkert 8681 - Number of Solenoid Valves

18
System Description
Variant with 2 solenoid valves – e.g. for double-acting actuators:
-withrestrictioncapabilityforeachsolenoidvalve(Type6524,see“Fig.6”onpage26)
- for safety position: solenoid valve V1 as NC valve, solenoid valve V2 as NO valve
- see also chapter “19Specialdesigns”onpage127
Process valve
up /
open
down /
close
Fig. 3: Fluid diagram (design for double-acting actuators: 2 solenoid valves, NC* + NO** )
5.3.3 Number of solenoid valves
Depending on the number of solenoid valves in the control head, the control head can control various
processvalves(single-acting and double-acting actuators as well as double-seated and multi-position
valves)oractasamerefeedbacktopwithoutsolenoidvalves:
Type of use Number of solenoid valves
Feedback top 0
Control head for single-acting actuators
1(NC*)
Control head for double-acting actuators
(bothdrivechambersnotenergisedanddeaerated)
2(2xNC*)
Control head for double-seated valves with integrated aeration of both
valve seats
3(3xNC*)
Controlheadfordouble-actingactuators(withsafetyposition)–for
details see chapter “19Specialdesigns”
2(1xNC*+1xNO**)
1
* NC = 3/2-way valve; closed in rest position, output A relieved
** NO = 3/2-way valve; opened in rest position, output A pressurised
english
Control Head Type 8681