Brochure

Model MB
Submittal Data
Model MB is a venturi style manual balancing valve with 100% positive
shut-off full port plated ball. Permanently installed venturi section,
Teflon seats, double o-ring shaft seals, Pressure/Temperature readout ports,
adjustable memory stop with position indicator, and union end with o-ring
seal. Available with multiple combinations of end connection types and sizes.
600 PSI (4140 kPa)
250 F (120 C)
Brass Venturi, Permanently installed
+ 3% of flow rate
Forged Brass
Brass – Fixed End:SWT, FNPT; Union End: SWT, FNPT,& MNPT
EPDM
Full size Zinc Plated lever with Vinyl Grip
Zinc Plated Steel
“PTV" combination PT & air vent, hose end drain valve, & extensions
SPECIFICATIONS
Pressure Ratings:
Temperature Ratings:
Flow Element:
Accuracy:
Body Material:
End Connections:
Seals:
Ball:
Steam:
Handle:
Memory Stop
Available Options:
∗ Please reference the tailpiece data sheet (Form #M-TP) for other sizes and connections.
Dimensions not for construction purposes unless certified by factory.
NOMINAL DIMENSIONS & WEIGHTS
Size
Flow Range
A
B C D E
*T
Cv
Wgt
in mm
GPM (10”-100”)
FNPT SWT
MPT
lbs kg
1/2" 15
(L) 0.4 - 1.3
in 3.46 3.55 2.30 3.66 1.98 1.82 1.50
(L) 2.0
1.31 0.59
(H) 1.3 - 4.0
mm 87.78 90.25 58.42 93.02 50.29 46.20 38.10
(H) 5.9
3/4"R 20
(L) 0.4 - 1.3
in 3.60 3.67 2.30 3.66 1.98 1.82 1.55
(L) 2.0
1.34 0.61
(H) 1.3 - 4.0
mm 91.47 93.27 58.42 93.02 50.29 46.20 39.37
(H) 5.9
3/4" 20
(L) 1.6 - 5.0
in 3.87 3.98 2.56 3.66 2.08 2.05 1.56
(L) 7.6
1.81 0.82
(H) 4.0 - 13.0
mm 98.30 101.12 65.05 93.01 52.83 52.07 39.70
(H) 13.0
1-1/4" 32 7.25 - 23.0
in 5.39 5.56 3.70 5.03 2.44 2.43 1.80
29.00 4.59 2.08
mm 136.83 141.25 93.95 127.76 61.90 61.74 45.72
1-1/2" 40 9.5 - 30.0
in 6.06 6.38 4.16 5.66 2.83 2.43 1.80
45.00 4.97 2.25
mm 153.92 162.05 105.66 143.76 71.88 61.74 45.72
2"R 50 15.0 - 50.0
in 6.57 7.36 4.45 5.66 2.83 2.74 1.98
77.40 7.10 3.20
mm 166.90 187.00 113.00 143.60 71.90 69.67 50.29
Please reference data sheet (Form #M-ACC) for optional accessories.
STANDARD COMPONENTS
Memory stop with position indicator, zinc coated steel.
Pressure/Temperature test port with brass body, dual durometer EPDM core, brass cap with O-ring seal and neoprene
retainer strap. Accepts standard 1/8” (4mm) gauge adapter or thermometer stem. Rated to 500 PSI (3450 kPa) and
275°F (135°C).
T
A
D
C
B
1"R 25
in 4.00 4.14 2.56 3.66 2.08 2.05 1.75
1.81 0.82
mm 101.60 105.16 65.03 92.96 52.83 52.07 44.45
(L) 1.6 - 5.0
(H) 4.0 - 13.0
D
C
B
Form # MB-03.14
Optional features and accessories available
for this Macon product are an extra charge,
and not included in the standard model price.
Tunstall Corporation
118 Exchange Street
Chicopee, MA 01013
Chrome Plated Brass, full port, 100% positive shut-off. Optional 316 Stainless Steel.
Brass. Optional 316 Stainless Steel.
(L) 7.6
(H) 13.0