Top performance demands complete balance. Macon balance. ® Macon Balancing Valves deliver an efficient, dependable, and cost-effective solution to measuring and balancing system flow rates that result in reduced maintenance, increased comfort and lower energy consumption.
MACON BALANCING VALVES Product Features STVL SERIES “Y” Pattern, Globe style design C Accurate and precise flow measurement Accurate and precise flow balancing Positive shut-off B Offsetting Pressure/ Temperature ports, Self sealing with optional Drain Kits Multi-turn, 360º handwheel with vernier scale and digital readout A Built in memory stop Sweat, Thread, Flanged and Groove connections Wide variety of accessories available Specifications - STVL SERIES Connection Solder, Sweat Maximum Working
MACON ® BALANCING STV SERIES C B Get the most from your heating and cooling system with MACON Balancing Valves…always delivering optimal performance and maximum efficiency. A Specifications - STV SERIES Connection NPT (Fem.
STVA / STVC SERIES B A Specifications - STVA / STVC SERIES STVA / STVC Grooved ends also available. Consult factory for details. Connection ANSI 125# Flanged Maximum Working Pressure 250 psi/16 Bar (PN 16) Operating Temperature Range -14˚ F to 250˚ F (-10˚ C to 120˚ C) Materials of Construction Body, Bonnet Cast Iron Gaskets EPDM Seat Seal PTFE Handwheel Polyamide Plastic STVA Valve Size Dimensions Nominal Dimensions Inches/mm Approx..
MACON ® BALANCING Valve Selection Guide Balancing Valves should be selected according to GPM flows, not line sizes. Valve Size Nominal Dimensions Minimum Flow Nominal Range of Flow Maximum Flow Inches mm GPM/LPM GPM/LPM GPM/LPM 1/2 DN 15 0.14 / .52 0.5 - 3.8 / 1.89 - 14.36 12.1 / 45.7 3/4 DN 20 .26 / .98 3.8 - 5.5 / 14.36 - 20.8 17.4 / 65.7 1 DN 25 .37 / 1.38 5.5 - 9.5 / 20.8 - 36 30 / 113.4 1 1/4 DN 32 .60 / 2.28 9.5 - 14 / 36 - 53 44.6 / 169 1 1/2 DN 40 .91 / 3.
Flow Measurement & Accuracy Flow Measurement & Accuracy Figure 3 Figure 3 16 Deviation +/% 14 12 10 8 6 4 2 1 2 3 4 5 6 7 8 9 10 Pre setting q CBI Actual Flow = q CBI Actual Flow = q Cv = 1.52 q Cv = 1.52 p p q in GPM, p in Ft. of H2O q in GPM, p in Ft.
MACON ® BALANCING Cv Values for Valve Series STVL, STV, STVA Flow coefficient values (Cv’s) at various handwheel settings Handwheel Setting 1 1.5 2 2.5 3 3.2 3.4 3.6 3.8 4 4.2 4.4 4.6 4.8 5 5.2 5.4 5.6 5.8 6 6.2 6.4 6.6 6.8 7 7.2 7.4 7.6 7.8 8 8.2 8.4 8.6 8.8 9 9.2 9.4 9.6 9.8 10 1/2” DN 15 0.21 0.29 0.37 0.44 0.52 0.56 0.59 0.63 0.67 0.72 0.77 0.81 0.87 0.93 1 1.07 1.14 1.21 1.28 1.36 1.44 1.52 1.62 1.74 1.88 2.06 2.26 2.49 2.73 2.96 3.13 3.29 3.42 3.54 3.65 3.77 3.87 3.98 4.06 4.12* 3/4” DN 20 0.
PRESSURE DROP TABLES Series STVL & STV, 1/2” – 2” Setting, number of turns This diagram details the relationship between flow, pressure drop and valve preset points. Use the diagram to select the correct valve size and corresponding handwheel setting to fulfill the application requirements. A Determine the required flow in the circuit (A) and the pressure drop (B). Draw a line between these two values. Read off the corresponding Cv value on the Cv scale (C).
MACON ® BALANCING Series STVA, 2 1/2” – 6” Setting, number of turns This diagram details the relationship between flow, pressure drop and valve preset points. Use the diagram to select the correct valve size and corresponding handwheel setting to fulfill the application requirements. A C D B Determine the required flow in the circuit (A) and the pressure drop (B). Draw a line between these two values. Read off the corresponding Cv value on the Cv scale (C).
MACON ® BALANCING Series STVC, 8” – 12” Setting, number of turns This diagram details the relationship between flow, pressure drop and valve preset points. Use the diagram to select the correct valve size and corresponding handwheel setting to fulfill the application requirements. A Determine the required flow in the circuit (A) and the pressure drop (B). Draw a line between these two values. Read off the corresponding Cv value on the Cv scale (C).
MACON ACCESSORIES Drains Max working pressure of 150psi/10 bar Must be installed before filling system Original O-rings make other sealing methods unnecessary A wide variety of Macon Balancing accessories are available.
MACON BALANCING A Division of Tunstall Corporation 118 Exchange Street Chicopee, MA 01013 Phone: 413-594-8695 Toll Free: 800-423-5578 Fax: 413-598-8109 www.maconbalancing.com Information contained in this brochure may be altered without notice.
