Omega Engineering Switch BVLS Series User Manual

BVLS Series  
Limit Switch for BVP70, BVPS70, BVP80 &  
BVPS80 Series Actuated Ball Valves  
 
MATERIALS OF CONSTRUCTION  
BODY / COVER: Aluminium with Teflon Imprenated Hard Anodized (PolyLube ) Surfaces  
PROBES: 316 Stainless Steel  
SEALS - COVER, PROBES: Buna N  
RATINGS / SPECIFICATIONS  
TEMPERATURE: 10 F to 180 F  
CONDUIT CONNECTION: 1/2” NPT  
ELECTRICAL RATING: 10 amp. 250VAC maximum; 1/2 amp. 125VDC; 1/4 amp. 250VDC; 5 amp.  
125VAC lamp load. Note: each pole must be the same polarity to utilize these ratings.  
MICROSWITCHES: Mechanical S.P.D.T. (Single Pole Double Throw)  
INTERNAL WIRING CONNECTIONS: Screw Clamp  
NEMA STANDARDS: NEMA 1 (General Purpose); NEMA 4 (Watertight & Dusttight); NEMA 7 (Haz-  
ardous Locations, Class I Groups B, C, & D); NEMA9 (Hazardous Locations, Class II, Groups E, F, &  
G); NEMA 12 (Oiltight and Driptight); and NEMA 13 (Oiltight and Dusttight).  
UL LISTINGS: Industrial Control Equipment for use in Hazardous Locations, Class I, Groups B,C, & D  
and Class II, Groups E, F, & G  
MAINTENANCE  
The BVLS normally requires no maintenance. However, in certain situations the switch adjustment  
screws may require some attention to either advance or retard the cam actuated switch point. This  
enables precise adjustment of the switch timing throughout the life of the unit.  
Electrical Schematic as  
Shown - Inside Cover  
Switch Adjustment  
Screws  
Terminal Strip  
3
 
Attachment of Limit Switch / NAMUR Mounting Pad  
1. Remove the position indicator from atop the actuator and secure  
the NAMUR 30 Shaft Coupling to the actuator Shaft Extension with  
the #6-32 Set Screw using a medium strength (nonpermanent) thread  
locker (not included in mounting kit).  
2. Place the Limit Switch / NAMUR Mounting Pad on top of the actua-  
tor. Be sure that the lower flats of the NAMUR 30 Shaft Coupling are  
oriented such that they align with the Limit Switch Mounting holes on  
the Limit Switch / NAMUR Mounting Pad.  
3. Fasten the Limit Switch / NAMUR Mounting Pad to the actuator  
using the (2) Mounting Bracket Screws.  
4. Slide the position indicator over the NAMUR 30 Shaft Coupling  
until it ‘snaps’ into place just above the bracket.  
Attachment of Limit Switch  
1. Fit the bushings, which extend from the Limit Switch housing, into the matching holes in the mounting pad. Push  
switch housing against pad and verify that switch body touches pad. Secure switch body to pad with two #10-24  
setscrews using a medium strength (nonpermanent) thread locker (not included in mounting kit). Note: Hex wrench sup-  
plied with Mounting Kit.  
Wiring Instructions  
1. Route the wire to be terminated through the conduit hub and up  
through the access space to the terminal block.  
2. Strip insulation back 1/4”, insert the stripped ends directly into the  
proper terminal clamps and tighten screws.  
3. Internal interconnections between terminal-block and switches are  
diagrammed inside the Limit Switch Cover.  
Note: If the Switch is installed in a hazardous location i.e. where  
flammable vapors or dust are present in the atmosphere, replace  
the cover and tighten securely before connecting the electrical sup-  
ply circuit. If necessary, a screwdriver shank or similar tool may be  
engaged in the cover wrenching lugs to assist removal and replace-  
ment.  
Wiring Specifications  
Switch Ratings  
AC  
DC  
250 volts; 10 amps  
250 volts; 0.25 amps  
125 volts; 0.50 amps  
Lamp Load 125 volts; 5 amps  
Wire Size  
#12AWG Max.  
#24AWG Min.  
4
 
65  
 
M-4153/0405  
6
 

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