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Mechanical disconnector electrically actuated
GB type according to EN
Construction
The mechanical disconnectors comprises:
• Housing with pressure gauge
• Outlet check valve
• PN 16 flanged connections to ISO 7005-2, DIN EN 1092-2
• Drain connector
• Spring bonnet
• Valve insert with spring
• Electrically actuated changeover valve
• Spindle guide with double O-ring seal
Materials
• Grey cast iron housing, powder coated inside and outside
• NBR seals
• Stainless steel valve stem and spring
• Brass changeover valve
• 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
• Red bronze for other internal parts
EN0H-1213GE23 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
R295SP-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).
The changeover from shutoff to flow positions can be by means
of an hydraulic or electrical/electronic actuator.
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, 1.0 or 1.5 bar as required
Minimum inlet pressure
Electrical connection 230 V~ / 50 Hz
Connection size DN 65 - 200
40°C
(DN 65 - DN 100)
0.5, 1.0 bar as required
(DN 125 - DN 200)
= opening pressure + 1.0 bar
Special Versions available on request
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R295SP-F Mechanical disconnector electrically actuated
Method of Operation
When the electrically actuated changeover valve receives an
electrical signal, for example from a pressure or flow switch or
water level indicator, the disconnector is hydraulically changed
over to the flow position.
This occurs because the exposure of the upper part of the piston
in the backflow preventer to atmospheric pressure is interrupted
and the inlet pressure is then applied to it and this in turn pushes
the piston so that it moves to the flow position.
When the draw off stops, the signal operates the electronic actuator in the reverse direction. The upper side of the piston is then
depressurised and the spring pushes the piston back to the shutoff position.
Options
R295SP-... FA = With flanges, 0.5 bar opening pressure
R295SP-... FB = With flanges, 1.0 bar opening pressure
(standard version)
R295SP-... FC = With flanges, 1.5 bar opening 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 45 55 112 186 245 324
kvs-value (full flow) 50 62 125 208 274 362
ξ value 111710 9 1019
Opening pressure (bar) 0.5, 1.0 or 1.5 bar as required 0.5 or 1.0 bar as required
DIN/DVGW Approval No. NW - 6301 AT 2324
SVGW Approval No. 8309-1381
46 www.honeywell.com
EN0H-1213GE23 R0206 y Subject to change without notice
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Installation Example
R295SP-F Mechanical disconnector electrically 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
• No further unprotected mains water supply may be connected downstream of the mechanical disconnector
• Mechanical disconnectors must not be fitted in any areas or
ducts where poisonous gases or vapours may be present or
where flooding can occur
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
• Boilers and automatic pressure fermentation equipment
• Heating system filling assemblies without DVGW approval,
water without inhibitors
EN0H-1213GE23 R0206 y Subject to change without notice
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R295SP-F Mechanical disconnector electrically actuated
DN 65 - 150
DN 200
Spare Parts
Mechanical disconnector R295SP-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
1.0 bar DN 65 R295AP-65FB
DN 80 R295AP-80FB
DN 100 R295AP-100FB
DN 125 R295AP-125FB
DN 150 R295AP-150FB
DN 200 R295AP-200FB
1.5 bar DN 65 R295AP-65FC
DN 80 R295AP-80FC
DN 100 R295AP-100FC
d Set of seals DN 65 0901093
DN 80 0901094
DN 100 0901095
DN 125 0901143
DN 150 0901145
DN 200 0901147
e Change over valve DN 65 - 100 0901407
DN 125 - 200 0901412
f Lip seal ring DN65 5350000
DN80 5350300
DN100 5350400
DN125 2070300
DN150 2067300
DN200 2238900
g Valve disc complete DN 65 0900376
DN 80 0900377
DN 100 0900378
DN 125 0900379
DN 150 0900380
DN 200 0900381
h Pressure gauge M39M-A16
Ranges 0 - 16 bar
i Pressure gauge M07M-A16
Ranges 0 - 16 bar
j 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-1213GE23 R0206
Subject to change
© 2006 Honeywell GmbH
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