4V-500 ½â-2â Modification Overview Production of the 4V-500 PVB began in 1998. The 4V utilizes a float assembly that contains a relief valve that protects the unit against…
40-500 ½â- 2â Modification Overview Production of the 40-500 PVB began in 1991 and was discontinued in 2003. Canopy Removal The canopy is secured by two screws. Bonnet…
PVB-4A ½â- 2â Modification Overview Production of the PVB4A series began in 2008 and is current. Canopy Removal The canopy is secured by two screws. Bonnet Removal The…
800 (M2,M3,M4) ½â-2â Modification Overview The original model 800 was produced from 1982-1993. The 800M2 was produced from 1991-1994. The 800M3 (1/2â,3/4â sizes only)…
800 (M2,M3,M4) ½â-2â Modification Overview The original model 800 was produced from 1982-1993. The 800M2 was produced from 1991-1994. The 800M3 (1/2â,3/4â sizes only)…