Instructions EM39003 - 05/10
39003 Series High Performance butterfly Valves
2
1. Introduction
1.1 Valve Description
The Masoneilan 39003 Series High Performance butterfly Valve
(HPbV) is designed for AnSI Class 150, 300 and 600 piping
systems and is available in both Wafer and Lug style body
designs. The standard size range available is as follows:
AnSI Class 150 ........................ 2" through 48"
AnSI Class 300 ........................ 2" through 30"
AnSI Class 600 ........................ 2" through 16"
1.2 Valve Design Features
• Masoneilan’s HPbVs feature a double offset (or double
eccentric) shaft design to minimize seat abrasion and lower
torque. This double offset design allows the disc to lift off and
“cam” away from the seat as it rotates open.
• The 39003 Series valve always rotates clockwise to close
(when viewed from above) and counterclockwise to open.
• The valve body has an overtravel stop which prevents the disc
from over rotating into the wrong quadrant. This stop is not
to be used as a disc position stop; if the disc contacts the
overtravel stop, this means it has rotated beyond the seat.
• The 39003 Series valve is bi-directional, but the preferred
installation position is with the seat in the upstream position
(SUS). note the arrow on the metal tag attached to the valve
body for preferred direction of flow.
1.3 Flange Compatibility
The 39003 Series valve is designed to fit between flanges as
follows:
AnSI Class 150 ........................ 2" through 24"
MSS SP-44 Class 150 ............. 30" through 48"
AnSI Class 300 ........................ 2" through 24"
MSS SP-44 Class 300 ............. 30"
AnSI Class 600 ........................ 2" through 16"
1.4 Gasket Compatibility
The 39003 Series valve is designed to accommodate the use of
standard fiber gaskets (such as non-asbestos, flexible graphite,
asbestos or equivalent gasket materials) of 1/16" or less,
meeting the dimensional requirements of AnSI/ASME b16.21.
Thick elastomeric gaskets are not recommended. Metallic
wound (Flexitallic) gaskets may be used with the wedge ring
retainer configuration.
1.5 Pipe Schedule Compatibility
The 39003 Series valve is designed to allow the disc edge to
rotate into the open position without interference with pipe of a
schedule equal to or lighter to those shown below:
Size
ANSI 150
ANSI 300
ANSI 600
2" – 12"
SCH 80
SCH 80
SCH 120
14" – 24"
SCH 40
SCH 80
SCH 120
30"
SCH 30
SCH 80
36" – 42"
STD WT
48"
XS
