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Tb ree•8eparate valves <br />ad pr ' <br />vacuums conditions ffi <br />storage tank&. <br />Husby Model 4885 <br />Incorporates three <br />separate valves to con- <br />trol over -pressure and <br />vacuum conditions <br />that arise in storage <br />tuft. The three valve <br />system provides the <br />necessary protection <br />and durability needed: <br />in a UST vent cap. ' <br />N The vacuum valve is <br />diaphragm operated, <br />and provides 10 tunes <br />more sealing force <br />than gravity devices. It <br />consistently opens at <br />8" of water column <br />(WC) vacuum.. <br />The first over -pressure <br />valve is diaphragm <br />operated, giving 10 <br />times more sealing <br />force than gravity <br />devices. It opens at 3" <br />of water column (WC) <br />pressure. <br />The safety overpres- <br />sure valve is designed <br />to handle high pres- <br />sure/high flow condi. <br />n <br />tions. This valve will <br />vent up to 7900 SCFH <br />at 2 psi. <br />Model 4885 is certified <br />to less than 1/3 of the <br />new CARB EVR <br />Standard CP 201, <br />which allows installa- <br />tion of 3 P/V Vents <br />rnaximmn. Reduces <br />Installation time by <br />not having to manifold <br />the vent pipes together. <br />11 The Model 4885 <br />(Threaded) Vent Cap <br />easily installs by using <br />the cast on heat nut. <br />Allows tightening with- <br />out having to go <br />between vent pipes. <br />The Model 4620 SIip <br />On Vent Cap, which <br />has same features as <br />Model 4885, has a <br />main pliable seal that <br />seals to the vent stack, <br />and provides <br />leakproof protection. <br />The seal is at the end <br />of the vent stack, not <br />on the threads. Four <br />stainless steel set <br />screws grip the vent <br />stack, preventing any <br />loosening of the seal. <br />n <br />SPECIFYING INFORMATION <br />Model Descrfption Weight <br />Number l.bs. (kg.) <br />4820 2" Slip -On Pressure Vent Cap 1.2 (.54) <br />*4885 2" Thread -On Pressure Vent Cap i-.2 (.54) <br />CONSTRUCTION <br />Body Die Cast Aluminum <br />Screen 40 Mesh Stainless Steel <br />Set Screws Stainless Steel <br />Deflector Aluminum <br />PATENTS AND LISTINGS <br />U.L. C.A:R.B. *EVR E.Q. VR -101 -A <br />Patents Pending <br />Model 4885 <br />