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Three separate valves force than gravity SPECIFYING INFORMATION <br />address pressure/ devices. It opens at 3" <br />vacuum conditions in of water column (WC) Model Description Weight <br />storage tanks. pressure. Number Lbs. (kg.) <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 />The safety over -pres- <br />sure valve is designed <br />to handle high pres- <br />sure/high flow condi- <br />tions. This valve will <br />vent up to 7900 SCFH <br />at 2 psi. <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 />4620 2" Slip On Pressure Vent Cap 1.17(5 <br />4885 2" Thread On Pressure Vent Cap 1.17( 3) <br />CONSTRUCTION <br />Body Cast Aluminum <br />Screen 40 Mesh Stainless Steel <br />Set Screws Stainless Steel <br />Deflector Aluminum <br />LISTINGS <br />:: <br />1109601 <br />