Cla-Val 98-06/698-06 Technical Manual - Manual (Page 7)

Setpoint High
Setpoint Low
Downstream
Pressure (P2)
Upstream
Pressure
(P1)
flow
Savings
P1
Upstream
Pressure
P2 (Q min.)
P2 (Q max.)
Modulating Profile
Downstream
Pressure
Q = Flow
Go to www.cla-val.com for Purchase Specification
Hydraulic
Pressure Management Control Valve
with Dual Setpoints
Typical Performance
A dual system pressure with reduced system
pressure during low demand periods is illustrated in
the chart. At low flows a minimum pressure is
maintained and as flow increases to the switch point
delivery pressure increases to the maximum pressure
set point for switch. The point between low pressure
and high pressure setpoints is adjustable to fine tune
valve to system requirements.The “water saving
zone” below maximum pressure line represents valve
effectiveness in reducing water losses and pipeline
breakage in a system.
Water Saving Zone for reduced leakage
and fewer pipe breaks
Flow
Pressure
Low Demand
High Demand
LP
HP
(Fire Flow,
Irrigation, etc.)
Water Saving Zone
• 100% Hydraulic Control
• Two Adjustable Downstream Set Points for
High and Low Pressure
• Simple to Setup and Adjust
• Smooth Transition from High to Low Pressure
• Retrofits to Existing Valve Without Removal
From Pipeline
• Helps Prevent Pipe Breaks and Background Leaks
98-06
(2"-10")
(Full Internal Port)
698-06
(3"-12")
(Reduced Internal Port)
MODEL
The Cla-Val Model 98-06/698-06 Pressure
Management Control Valve is a pressure
reducing valve that allows for two downstream
set points. A high pressure set point is selected
for high flow demand and a low pressure set
point is selected for low flow demand. This dual
set point arrangement allows for reduction in
water loss by not over pressurizing the system
during times of low demand, while providing
adequate pressure during high or fire demand.
The design is 100% hydraulic and in addition to
the dual pressure set points the transition point
at which the pressure changes based on the
flow is adjustable as well. The patent pending
design of the valve allows for smooth transition
from one set point to the other.