Mechanical disconnector hydraulic actuated
GB type according to EN
Construction
The mechanical disconnectors comprises:
• Housing with pressure gauge
• Outlet differential pressure transducer
• Spring bonnet
• PN 16 flanged connections to ISO 7005-2, DIN EN 1092-2
• Hydraulically controlled changeover valve
• Drain connector
• Valve insert with spring
• Spindle guide with double O-ring seal
Materials
• Grey cast iron housing, powder coated inside and outside
• Steel spring bonnet
• Elastic, ageing and scuff resistant elastomer seals
• Stainless steel valve stem and spring
• Red bronze for other internal parts
• Red bronze drain connector up to DN 100, Grey cast iron
drain connector DN 125 - DN 200, powder coated inside and
outside
• Chrome plated balanced-seat piston
EN0H-1212GE23 R0206 y Subject to change without notice
• High grade synthetic material bearing surfaces for sliding internal parts
1717/ type 2 according to DIN1988 part 4
R295HP-F
Product specification sheet
Application
Mechanical disconnectors of this type are suitable for the protection of drinking water systems as required by EN 1717 "The technical regulation of drinking water systems" and correspond to
DIN1988 part 4 type 2 construction.
Their purpose is to protect systems against back pressure, back
flow and back syphonage of non-potable water into the public
water supply network.
Mechanical disconnectors of this type can be used to provide
protection up to and including liquid category 4 (toxic, very toxic,
carcinogenic and radioactive substances).
Special Features
• DIN/DVGW and SVGW approvals in all connection sizes
• Optimal protection of the drinking water supply system
• Enhanced protection against back pressure, back flow and
back syphonage into the water supply network
• Shutoff position visually indicated on the spring bonnet
• Compact construction
• Powder coated inside and outside - Powder used is physiologically and toxicologically safe
• Meets KTW recommendations for potable water
•Low pressure loss
Range of Application
Medium Cold water
Max. inlet pressure 16.0 bar
Technical Data
Installation position Horizontal with spring bonnet upwards
Max. operating
temperature
Opening pressure 0.5 bar
Minimum inlet pressure
Minimum flow rate 1.0 l/min
Connection size DN 65 - 200
40°C
1.5 bar
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R295HP-F Mechanical disconnector hydraulic actuated
Method of Operation
Type 2 mechanical disconnectors are normally in the shutoff position. When water is drawn from the downstream system, the
differential pressure in the mechanical disconnectors rises. If the
differential pressure rises above 0.5 bar, the hydraulic operator
causes the control valve to change the mechanical disconnectors into the flow position. When the draw-off stops, the differential pressure then falls again and the pressure sensor transmits a
signal to the control valve, which then returns the mechanical disconnectors to the normal shutoff position.
Options
R295HP-... FA = With flanges, differential pressure 0.5 bar ope-
ning pressure
Special Versions available on request
Connection size
Connection size DN 65 80 100 125 150 200
Weight approx. kg 49 68 90 146 207 409
Dimensions mm
L 532 572 652 752 882 1102
H 380 495 475 528 563 851
h 165 208 232 280 313 438
Nominal flow rate m
3
/h
at ∆p = 0.8 bar 21 31 45 89 134 222
kvs-value (full flow) 24 35 50 100 150 248
ξ value 50.0 53.5 64.0 39.0 36.0 42.0
DIN/DVGW Approval No. NW - 6301 AT 2323
42 www.honeywell.com
EN0H-1212GE23 R0206 y Subject to change without notice
Installation Example
R295HP-F Mechanical disconnector hydraulic actuated
Installation Guidelines
• Install shutoff valves
• Install in horizontal pipework with spring bonnet directed upwards
o This orientation ensures optimum performance
• Ensure good access
o Pressure gauge can be read off easily
o Simplifies maintenance and inspection
• Install a strainer upstream of the mechanical disconnector
o To protect the mechanical disconnector from dirt
• If pressure shock is anticipated in the outlet side of the disconnector, a pressure shock damper or expansion vessel
must be fitted on the system downstream of the disconnector
Flow Diagram
Typical Applications
Mechanical disconnectors of this type are best suited for commercial and industrial applications.
However they can also be used for supplies to residential buildings within the scope of their specification.
The following are some typical applications:
• Chemical mixing plant
• Chemical cleaning appliances
• Softening and deacidification plant without DVGW approval.
Regeneration with and without acid and alkaline solutions. Disinfection with Formalin
•Galvanic bath
• Garden tap connections
• Soda machines
• Boilers and automatic pressure fermentation equipment
• Heating system filling assemblies without DVGW approval,
water without inhibitors
EN0H-1212GE23 R0206 y Subject to change without notice
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R295HP-F Mechanical disconnector hydraulic actuated
DN 50 - 150
DN 200
Spare Parts
Mechanical disconnector R295HP-F
No. Description Dimension Part No.
c Valve insert complete
0,5 bar DN 65 R295AP-65FA
DN 80 R295AP-80FA
DN 100 R295AP-100FA
DN 125 R295AP-125FA
DN 150 R295AP-150FA
DN 200 R295AP-200FA
d Set of seals DN 65 0901093
DN 80 0901094
DN 100 0901095
DN 125 0901143
DN 150 0901145
DN 200 0901147
e Operating valve DN 65 - 200 2183500
f Pressure balancing
DN 65 - 200 0901417
valve
Lip seal ring DN65 5350000
g
DN80 5350300
DN100 5350400
DN125 2070300
DN150 2067300
DN200 2238900
Valve disc complete DN 65 0900376
h
DN 80 0900377
DN 100 0900378
DN 125 0900379
DN 150 0900380
DN 200 0900381
i Pressure gauge M39M-A16
Ranges 0 - 16 bar
j Pressure gauge M07M-A16
Ranges 0 - 16 bar
k Hexagon-plug all S06M-1/4
1
with O-ring R
/4"
(5 pcs.)
Automation and Control Solutions
Honeywell GmbH
Hardhofweg
D-74821 Mosbach
Phone: (49) 6261 810
Fax: (49) 6261 81309
http://europe.hbc.honeywell.com
www.honeywell.com
Manufactured for and on behalf of the
Environmental and Combustion Controls Division
of Honeywell Technologies Sàrl, Ecublens, Route
du Bois 37, Switzerland by its Authorised Representative Honeywell GmbH
EN0H-1212GE23 R0206
Subject to change
© 2006 Honeywell GmbH
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