Omega Engineering Plumbing Product BV70 User Manual

BV70 Series  
Premium Quality Tube Compression End  
Style Bar Stock Ball Valves  
 
CONNECTION / STYLE SIZES  
MATERIALS OF CONSTRUCTION  
Tube / Compresssion 1/4” - 1”  
BODY: Brass - ASTM B-16, or 316 Stainless Steel -  
ASTM A276  
BALL AND STEM: 316 Stainless Steel  
SEATS AND STEM SEAL: Glass Reinforced  
P.T.F.E. (Teflon  
)
RATINGS  
TEMPERATURE: -50 F to 450 F  
(also see Pressure Temperature Chart)  
PRESSURE: 1000 p.s.i. C.W.P. (Cold Working  
Pressure to 150 F)  
(also see Pressure Temperature Chart)  
VACUUM: 20 Micron  
SATURATED STEAM: 150 p.s.i.  
FLOW CHARACTERISTICS  
The approximate flow rate through a valve can be calculated as follows:  
P
Q = Cv  
G
where;  
Q = flow rate in gallons (U.S. Std.) per minute  
Cv = valve constant  
P = pressure drop across the valve in pounds per square inch  
G = specific gravity of the media of relative to water  
Note: The values derived from the flow equation are for estimating purposes only. Product variances  
or systemic factors may alter actual performance.  
3
 
INSTALLATION INSTRUCTIONS  
Tube (initial assembly):  
1. Ensure the tube end is square and free from burrs, nicks, scratches and debris.  
2. Loosen the NUT by turning it counter-clockwise one turn. Insert the tube though the NUT and  
FERRULES until it sits against the internal VALVE SHOULDER. Tighten the NUT (clock-wise) hand  
tight. Continue tightening the NUT with a wrench for 1 to 1-1/4 turns or until snug.  
Note: for re-assembly, after initial assembly, approximately 1/4 turn with wrench is generally required  
to re-tighten.  
MAINTENANCE  
The BV70 Series utilizes our self compensating stem seal design. This design automatically compen-  
sates for wear as well as thermal expansion and contraction resulting in a leak tight, maintenance free,  
service life.  
Once the stem seal has worn beyond the compensation afforded by the Belleville springs adjustment  
of the stem nut may enable valve to be returned to service. Holding the ‘flats’ of the stem, tighten the  
stem nut until Belleville springs become fully compressed (flattened); the torque required to tighten the  
nut further increases sharply when this point is reached. Do not tighten the stem nut beyond this point  
to avoid damage of the stem seal.  
DIMENSIONS  
Tube  
Dimensions - Inches  
Size OD  
A
B
C
D
E
F
1/4  
3/8  
1/2  
3/4  
1
3.72 1.58 .50 2.31 .19 9/16  
3.70 1.58 .50 2.31 .28 11/16  
3.94 1.58 .50 2.31 .36 7/8  
4.17 1.67 .59 3.41 .49 1-1/8  
4.92 1.91 .75 3.41 .62 1-1/2  
4
 
5
 
M-4058/0405  
6
 

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