Brochure
The Parabolic Flow insert produces a
smooth and responsive flow curve. The
valve achieves an equal percentage flow
characteristic resulting in linear heat transfer
for optimal control. Unlike a disc that sits
outside of the ball, the characterized insert is
integral to the ball, resulting in longer service
life and higher differential pressure capabilities.
5
Control Valve Selection Criteria
2-Way
Attribute Specification
NPT
Thread
ANSI
Flange
Valve Size
(Inch) (DN) VBN2 VBF2
0.5 15 •
0.75 20 •
1 25 •
1.25 32 •
1.5 40 •
2 50 •
2.5 65 •
3 80 •
4 100 •
5 125 •
6 150 •
Static Pressure
Class 125 (240 psi) •
360 psi •
Close-Off Pressure *
100 psi (min) •
70 psi (min) •
Media
Chilled Water (50% glycol max) • •
Hot Water (50% glycol max) • •
Medium Temperature Min -22˚F / Max 250˚F • •
Flow Characteristic
Equal Percentage • •
Linear (full port valves) •
Maximum Seat Leakage ANSI Class IV (0.01% of Cv max) • •
Rangeability 50:1 min *** • •
Trim
Nickel plated brass •
Stainless steel • •
In-line Serviceability Stem replacement kit • •
Actuator Options
Modulating 2-10 Vdc • •
24 Vac Floating • •
24 Vac 2-position • •
Fail-Safe (FO/FC) • •
Accessories Actuator Cable Assembly ** •
* Maximum operating differential pressure. Maximum differential pressure for quiet service may be lower.
** On MVN actuators only. Available separately or factory installed.
*** Cv 0.38 and Cv 0.68 in 1/2" size, and Cv 0.31 and Cv 0.63 in 3/4" has less than 50:1 rangeability.
3-Way
Attribute Specification
NPT
Thread
ANSI
Flange
Valve Size
(Inch) (DN) VBN3 VBF3
0.5 15 •
0.75 20 •
1 25 •
1.25 32 •
1.5 40 •
2 50 •
2.5 65 •
3 80 n/a
4 100 •
5 125 •
6 150 •
Static Pressure
Class 125 (240 psi) •
360 psi •
Close-Off Pressure *
40 psi (min) •
70 psi (min) •
Media
Chilled Water (50% glycol max) • •
Hot Water (50% glycol max) • •
Medium Temperature Min -22˚F / Max 250˚F • •
Flow Characteristic
Equal Percentage • •
Linear (full port valves) •
Maximum Seat Leakage
ANSI Class IV (0.01% Cv max.) • A-port
ANSI Class III (0.10% Cv max.) B-port
Rangeability Does not apply to 3-way valves
Trim
Nickel plated brass •
Stainless steel •
In-line Serviceability Stem replacement kit • •
Actuator Options
Modulating 2-10 Vdc • •
24 Vac Floating • •
24 Vac 2-position • •
Fail-Safe (FO/FC) • •
Accessories Actuator Cable Assembly ** •
* Maximum operating differential pressure. Maximum differential pressure for quiet service may be lower.
** On MVN actuators only. Available separately or factory installed.
*** Cv 0.38 and Cv 0.68 in 1/2" size, and Cv 0.31 and Cv 0.63 in 3/4" has less than 50:1 rangeability.