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Three separate valves <br />address pressure/ <br />vacuum conditions in <br />storage tanks. <br />■ Husky Model 4620 <br />incorporates three <br />separate valves to con- <br />trol over -pressure and <br />vacuum conditions <br />that arise in storage <br />tanks. The three valve <br />system provides the <br />necessary protection <br />and durability needed <br />in a UST vent cap. <br />■ The vacuum valve is <br />diaphragm operated, <br />and provides 10 times <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 />HUSKY 4620 <br />PRESSURENENT CAP FOR UST <br />force than gravity SPECIFYING INFORMATION <br />devices. It opens at 3" <br />of water column (WC) Model Description Weight <br />pressure. Number Lbs. (kg.) <br />■ The safety over-pres- 4620 2" Slip On Pressure Vent Cap 1.17(.53) <br />sure valve is design <br />to handle high pres- 4885 2" Thread On Pressure Vent Cap 1.17(.53) <br />sure/high flow condi- <br />tions. This valve will <br />vent up to 7900 SCFH CONSTRUCTION <br />at 2 psi. <br />Body Cast Aluminum <br />■ The Model 4620 Vent <br />Cap has a pliable main <br />seal that seals to the <br />vent stack and pro- <br />vides leakproof pro- <br />tection. The seal is at <br />the end of the vent <br />stack, not on the <br />threads. Four stainless <br />steel set screws grip <br />the vent stack, pre- <br />venting any loosening <br />of the seal. <br />■ Mounts on 2" threaded <br />or smooth vent pipe. <br />Threaded adapter is <br />available for areas that <br />mandate threaded <br />vents. <br />Model 4620 <br />Screen 40 Mesh Stainless Steel <br />Set Screws Stainless Steel <br />Deflector Aluminum <br />LISTINGS <br />U.L. C.A.R.B. <br />OIS09001F <br />8.98 <br />In <br />