Brochure
Table Of Contents
Tunstall Corporation 
118 Exchange Street • Chicopee, MA 01013 
We reserve the right to alter designs, specifications and information without notice. 
Phone (413) 594-8695 · Fax (413) 598-8109 
www.tunstall-inc.com • www.maconcontrols.com 
Bulletin-MC-NTV-0714 
Valves 
NT SERIES VALVES 
A
B
C
A
C
B
A
B
C
B
A
C
DATA - Macon Valves for NT Series 
Vertical Angle NPT 
1/2”, 3/4”, 1”, 1-1/4” 
Straight NPT 
1/2”, 3/4”, 1”, 1-1/4” 
Horizontal Angle NPT 
1/2”, 3/4”, 1”, 1-1/4” 
Straight Female Sweat 
1/2”, 3/4”, 1” 
Disc Material: EPDM 
Body Styles: Straightway or angle 
Maximum steam pressure: 15 psig 
Maximum static pressure: 145 PSI 
Maximum water temperature: 250°F 
Body tappings: Female inlet, male union outlet, 
Female sweat 
Body Material: Forged brass, NPT valves are 
nickel-plated 
Max. Differential pressure: 20 psi H
2O, refer 
to thermostat specs 
Suggested Differential Pressure = 0.5 to 2.9 psi 
Overall Height: Add thermostat dimensions less 1/4”
Macon NT Series Valves are in an open position when no 
operator is attached. 
CV:  1/2”  = 1.8 
  3/4”  = 2.5 
  1”  = 2.74 
  1-1/4”  = 3.5 
DIMENSIONS 
VERTICAL ANGLE 
STRAIGHTWAY 
BODY #  SIZE  A  B  C 
BODY #  SIZE  A  B  C 
N10637 1/2”  2-1/4”  1”  1-3/4” 
N10737 1/2”  3-1/2” 2-1/16”  1” 
N10657 3/4”  2-1/2” 1-1/8” 2-1/8”  N10757  3/4”  4”  2-1/2”  1” 
N10677 1”  3”  1-3/8” 2-1/4”   N10777 1”  4-5/8” 2-15/16” 1” 
N10697 1-1/4”  3-1/4”  1-3/4”  2-3/4”   N10797 1-1/4”  5-1/4”  3-3/8”  1-1/8” 
HORIZONTAL ANGLE 
BODY #  SIZE  A  B  C 
BODY #  SIZE  A  B  C 
N10837 1/2”  3-3/8” 2-3/16” 1-1/2” 
N10930 1/2” 2-3/16” 1-3/32”  1” 
N10857 3/4”  3-3/4” 2-1/2” 1-1/4”   N10950 3/4” 2-11/16” 1-11/32” 7/8” 
N10877 1” 4-3/16” 3”  1-3/8”   N10970 1” 3-5/32” 1-9/16” 1” 
N10897 1-1/4” 4-3/4” 3-1/4” 1-7/8”    
SWEAT VALVES 










