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BERMAD Waterworks
WD 700-ES Series
Double Chamber Actuator -
Standard Product
Wide range of flow & pressure
Versatile control
Full powered opening & closing
Accurate & stable regulation
Non-slam closing
Protected Diaphragm
Control to Close
Control to Open
studi[o]z
Y Pattern Valve
High flow capacity
Semi straight flow
High cavitation resistance
Quiet valve operation
Control Loop
Fully balanced trim, St. St. made, Pilot valve for
very high accuracy and stability.
Control tubing and accesorries all made of High
Grade St. St. 316.
Pilot Valves Range
Fully balanced trim
Stainless Steel standard
High accuracy & stability
St. St. 316 Accessories
High grade St. St. 316 Tubings & Fittings
BERMAD
Water Control Solutions
Panel Mounted Control
Trim-Serviceability
BERMAD
Waterworks
BERMAD
Fire Protection
BERMAD
Petroleum
BERMAD
Irrigation
BERMAD
Turf
One panel fits: DN50 – DN300
Allows "direct sale from the shelf" of a basic
valve + panel
Left or right installation
Control panel is installed in a protected,
accessible and safe location
WD 700-ES Series
info@bermad.com • www.bermad.com
The information herein is subject to change without notice. BERMAD shall not be held liable for any errors. All rights reserved.
© Copyright by BERMAD. PC7WEES 08
Water Control Solutions

BERMAD Waterworks BERMAD Waterworks BERMAD Waterworks
WD 700-ES Series WD 700-ES Series WD 700-ES Series
Features & Benefits
High Grade Specification
Main Applications
Body designed for very high cavititation resistance
Cavitation is a physical phenomenon, which can arise in liquids. It describes the transition phase between liquid and vapor
conditions caused by high flow velocity.
The ES valve body and internal design, allows the cavitation energy to dissipate without causing any damage to the valve.
Position Indicator
Nuts & Bolts: St. Steel
Double Chamber
Actuator
Internal Trim: St. Steel
V-Port: Plug
Pressure Ratings:
PN 16 / PN 25
Pressure Reducing Systems
Establishing various pressure zones is one of
the most common means to achieve balance in
water transmission and distribution networks.
Pressure-Reducing Valves (PRV) “force” the
dynamic parameters of the supply system into
a constant predetermined delivery pressure.
"Active PRV," through definition of minimum
B
required pressure at each pressure zone’s critical
point, enables continuous readjustment of
delivery pressure. This allows the system to work
at a lower average pressure, to reduce water
leaks and reduce burst frequencies.
Pressure Relief / Sustaining Applications
Cavitation Guide
Valve Body:Y Pattern
("Semi-Straight Flow")
1
2
Pressure-Relief/Sustaining Valves protect pumps
and water distribution systems from two extreme
situations:
1) When installed off-line, they relieve damaging
excessive pressure.
2) When installed in-line, they sustain minimum
back-pressure thus prioritizing pressure zones,
preventing line emptying, pump overload, etc.
Because of the very high cavitation resistance, the cavitation damage zone in the WD-ES valves is much smaller than in standard
valves. An inlet/outlet pressure ratio of about 12:1 can be reached, adding a large operational area to better utilize the valve.
Raised Seat / Wide Body
for anti-cavitation
Body: Ductile Iron
FB Epoxy Coating
RAL 5005: 250μ
5
700 Series - Standard Valves
5
700 Series ES Valves
Flange to Flange length according to ISO/EN Standards
Level Control Valves
Outlet Pessure / Bar
4
3
2
1
Cavitation Free Zone
press. ratio
12/3.5 = 3.4
Cavitation
Damage Zone
Outlet Pessure / Bar
4
3
2
1
Cavitation Free Zone
press. ratio
12/1 = 12
Cavitation
Damage Zone
ISO 9001-2000
INTERNATIONAL
WRAS, UK
DVGW, Germany
Groupe
ACS, France
Float controlled valves combine the advantages
of excellent hydraulic control valves with the
simplicity of mechanical floats. The ability to
separate the main valve from the float eliminates
most of the installation and maintenance
problems associated with mechanical float valves.
The wide selection of floats types makes Float
Control Valves the solution wherever level control
is required.
0
0 2 4 6 8 10 12 14 16 18 20
Inlet Pessure / Bar
0
0 2 4 6 8 10 12 14 16 18 20
Inlet Pessure / Bar
General guide. For optimum conditions please consult Bermad.
GOST, Russia ÖVGW, Austria BELGAQUA, Belgium NSF 61, USA