Tunstall Macon STV Series Manual page 25

Model MBF Manual Balancing Valve features a cast steel venturi flow ele-
ment. The precision machined throat provides measurement accuracy of
± 3% of flow rate. Mounted on the discharge is a ductile iron lug type
butterfly valve with adjustable flow positioning plate. ANSI 125/150 flanged
end connections. Dual extended length Pressure/Temperature ports. Hanging
I.D. Tag.
SPECIFICATIONS
Pressure Ratings:
Temperature Ratings:
Accuracy:
Body Material: Venturi:
Butterfly Valve: Ductile Iron A536 65-45-12
End Connections:
Flow Element:
Disc:
Stem:
Seat:
Bushing:
Seal:
Metering Ports:
Available Options:
NOMINAL DIMENSIONS & WEIGHTS
SIZE
MODEL
in mm
MBF-250 2-1/2" 65
3" 75
MBF-300
MBF-400 4" 100
5" 125
MBF-500
MBF-600 6" 150
Dimensions not for construction purposes unless certified by factory.
STANDARD COMPONENTS
Pressure / Temperature test port with brass body, dual durometer EPDM core, PTE Extender, 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 275ºF (135ºC)
Please reference data sheet #Bulletin-MB-Accessories for optional accessories.
Optional features and accessories available for this
Macon product are an extra charge, and not included
in the standard model price.
www.maconbalancing.com
200 PSI (1380 kPa)
225ºF (107ºC)
± 3% of flow rate
Carbon Steel ASTM A-120
ANSI Class 125/150# Flanged
Brass Venturi, Permanently installed
Aluminum Bronze B148 C954
Stainless Steel 416 A582
EPDM with Phenolic Backing
Teflon/Fiberglass Backed
EPDM
Extended Length Pressure/Temperature test ports
"PTV" combination PT & Air Vent
A B
in 8.75 7.00
mm 222.25 177.80
in 9.78 7.50
mm 248.41 190.50
in 11.50 9.00
mm 292.10 228.60
in 13.13 10.00
mm 333.50 254.00
in 14.73 11.00
mm 374.14 279.40
C D
4.20 9.12
106.65 231.90
4.54 9.13
115.29 231.90
5.02 9.00
127.48 228.60
5.53 9.00
140.49 228.60
6.04 8.88
153.39 225.55
Tunstall Corporation
118 Exchange Street · Chicopee, MA 01013
Phone (413) 594-8695 · Fax (413) 598-8109
Section: Components
25
Model MBF
2.50" to 6.00"
Submittal Data
Weight
E
lbs kg
8.13
32.00 14.51
206.50
8.38
38.00 17.23
212.85
9.13
55.00 24.94
231.90
9.63
79.00 35.83
244.60
10.13
92.00 41.73
257.30
Bulletin-MB-MBF-250-600-0915