Safety valves Equalising valves

FMECHANICAL ENGINEERING LIGHTING HEATING WEAPONS BLASTING ENGINES OR PUMPS F16Engineering elements F16KVALVES TAPS COCKS ACTUATING-FLOATS DEVICES FOR VENTING OR AERATING

F16K17/00Safety valves Equalising valves

F16K17/003reacting to pressure and temperature F16K17/006specially adapted for shelters F16K17/02opening on surplus pressure on one side closing on insufficient pressure on one side F16K17/025and remaining open after return of the normal pressure F16K17/04spring-loaded F16K17/0406in the form of balls F16K17/0413in the form of closure plates F16K17/042with locking or disconnecting arrangements F16K17/0426with seat protecting means F16K17/0433with vibration preventing means F16K17/044with more than one spring F16K17/0446with an obturating member having at least a component of their opening and closing motion not perpendicular to the closing faces F16K17/0453the member being a diaphragm F16K17/046the valve being of the gate valve type or the sliding valve type F16K17/0466with a special seating surface F16K17/0473Multiple-way safety valves F16K17/048combined with other safety valves, or with pressure control devices F16K17/0486with mechanical actuating means F16K17/0493with a spring other than a helicoidal spring F16K17/06with special arrangements for adjusting the opening pressure F16K17/065with differential piston F16K17/08with special arrangements for providing a large discharge passage F16K17/082with piston F16K17/085with diaphragm F16K17/087with bellows F16K17/10with auxiliary valve for fluid operation of the main valve F16K17/105using choking or throttling means to control the fluid operation of the main valve F16K17/12weight-loaded F16K17/14with fracturing member F16K17/16with fracturing diaphragm; Rupture discs F16K17/1606of the reverse-buckling-type F16K17/1613with additional cutting means F16K17/162of the non reverse-buckling-type F16K17/1626with additional cutting means F16K17/1633made of graphite F16K17/164and remaining closed after return of the normal pressure F16K17/168combined with manually-controlled valves F16K17/18opening on surplus pressure on either side F16K17/19Equalising valves predominantly for tanks F16K17/192with closure member in the form of a movable liquid column F16K17/194weight-loaded F16K17/196spring-loaded F16K17/20Excess-flow valves F16K17/205specially adapted for flexible gas lines F16K17/22actuated by the difference of pressure between two places in the flow line F16K17/24acting directly on the cutting-off member F16K17/26operating in either direction F16K17/28operating in one direction only F16K17/285the cutting-off member being a ball F16K17/30spring-loaded F16K17/32acting on a servo-mechanism or on a catch-releasing mechanism F16K17/34in which the flow-energy of the flowing medium actuates the closing mechanism F16K17/36actuated in consequence of extraneous circumstances F16K17/363the closure members being rotatable or pivoting F16K17/366the closure member being a movable ball F16K17/38of excessive temperature F16K17/383the valve comprising fusible, softening or meltable elements F16K17/386the closure members being rotatable or pivoting F16K17/40with a fracturing member F16K17/403with a fracturing valve member F16K17/406the fracturing member being a generally elongated member F16K17/42Valves preventing penetration of air in the outlet of containers for liquids