TM 55-1930-209-14&P-2 Table 3-2.  Seawater System Valves (continued) Figure 1-3 Label Identification Type: Callout Location and Valve Function 1/4-in gate valve SW35 Void 2 port - In sea- COOLING WATER STRAINER water supply line PRESSURE IN: Allows pressure between seachest and reading on supply side cooling water strainer of cooling water strainer 1/4-in gate valve SW36 Void 2 port - In COOLING WATER STRAINER seawater supply line PRESSURE OUT: Allows pressure between cooling water reading on discharge side of strainer and cooling pump cooling water strainer 4-in gate valve SW37 Void 4 port - In sea- GENERATOR COOLING water supply line SEACHEST TO STRAINER: between seachest and Allows flow from sea- strainer chest to strainer and isolates strainer 2-in gate valve SW38 Void 4 port - On input STRAINER TO GENERA- side of generator 1 TOR 1 COOLING: Allows cooling line cooling flow to generator 1 and isolates strainer 2-in globe valve SW39 Void 4 port - On GENERATOR 1 COOLING discharge side of TO OVERBOARD: Allows cooling generator cooling line flow from generator and isolates generator from overboard discharge 2-in gate valve SW40 Void 4 starboard - On STRAINER TO GENERATOR input side of generator 2 2 COOLING: Allows cooling cooling line flow to generator 2 and isolates strainer 2-in globe valve SW41 Void 4 starboard - On GENERATOR 2 COOLING discharge side of TO OVERBOARD: Allows cooling generator cooling line flow from generator and isolates generator from overboard discharge 1 1/4-in gate valve SW42 Void 4 starboard - On STRAINER TO 20 kW input side of 20 kW GENERATOR COOLING: generator cooling Allows cooling flow to 20 kW generator and isolates strainer 1 1/4-in globe valve SW43 Void 4 starboard - On 20 kW GENERATOR COOL- discharge side of 20 kW ING TO OVERBOARD: Allows generator cooling line cooling flow from generator and isolates generator from overboard discharge 2-in gate valve SW44 ROWPU space - in cooling GENERATOR COOLING SEA- water seachest vent line CHEST VENT: Allows sea- chest venting 3-9