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39 Series AF10-A to AF60-A Valve seat Bowl Valve Lever Float Chamber Piston Spring Housing Seal Drain cock q r e w t i y u o !0 !1 Drain Bowl Valve Lever Float Valve seat Chamber Piston Spring Housing Seal Drain cock q r e w t i u y o !0 !1 Drain Bowl Float Lever Valve Valve seat Knob q w e r t y Drain Working Principle: Float Type Auto Drain . When pressure inside the bowl is released: Even when pressure inside the bowl q is released, spring y keeps the piston u in its upward position. This keeps the seal created by the seal !0 in place; thus, the inside of the bowl q is shut off from the outside air. Therefore, even if there is an accumulation of condensate in the bowl q, it will not drain out. . When pressure is applied inside the bowl: Even when pressure is applied inside the bowl q, the combined force of the spring y and the pressure inside the bowl q keeps the piston u in its upward position. This maintains the seal created by the seal !0 in place; thus, the inside of the bowl q is shut off from the outside air. If there is no accumulation of condensate in the bowl q at this time, the float w will be pulled down by its own weight, causing the valve r, which is connected to the lever e, to seal the valve seat t. . When there is an accumulation of condensate in the bowl: The float w rises due to its own buoyancy and the seal at the valve seat t is interrupted.This allows the pressure inside the bowl q to enter the chamber i. The result is that the pressure inside the chamber i surpasses the force of the spring y and pushes the piston u downward. This causes the sealing action of the seal !0 to be interrupted and the accumulated condensate in the bowl q drains out through the drain cock !1. Turning the drain cock !1 manually counterclockwise lowers the piston u, and causes the seal created by the seal !0 to be interrupted, thus allowing the condensate to drain out. . When pressure inside the bowl is released: When pressure is released from the bowl q, the piston u is lowered by the spring y. The sealing action of the seal !0 is interrupted, and the outside air flows inside the bowl q through the housing hole o and the drain cock !1. Therefore, if there is an accumulation of condensate in the bowl q, it will drain out through the drain cock. . When pressure is applied inside the bowl: When pressure is 0.1 MPa or more, the force of the piston u surpasses the force of the spring y, and the piston goes up. This pushes seal !0 up so that it creates a seal, and the inside of the bowl q, is shut off from the outside air. If there is no accumulation of condensate in the bowl q at this time, the float w will be pulled down by its own weight, causing the valve r, which is connected to the lever e, to seal the valve seat t. . When there is an accumulation of condensate in the bowl: The float w rises due to its own buoyancy and the seal at the valve seat t is interrupted. This allows the pressure inside the bowl q to enter the chamber i. The result is that the combined pressure inside the chamber i and the force of the spring y lowers the piston u. This causes the sealing action of the seal !0 to be interrupted, and the accumulated condensate in the bowl q drains out through the drain cock !1. Turning the drain cock !1 manually counterclockwise lowers the piston u, and causes the seal created by the seal !0 to be interrupted, thus allowing the condensate to drain out. N.O. type: AD38-A, AD48-A N.C. type: AD37-A, AD47-A Compact auto drain N.C. type: AD17-A, AD27-A . When pressure inside the bowl is released: Even when pressure inside the bowl q is released, the weight of the float w causes the valve r, which is connected to the lever e, to seal the valve seat t. As a result, the inside of the bowl q is shut off from the outside air. Therefore, even if there is an accumulation of condensate in the bowl q, it will not drain out. . When pressure is applied inside the bowl: Even when pressure is applied inside the bowl q, the weight of the float w and the differential pressure that is applied to the valve r cause the valve r to seal the valve seat t, and the outside air is shut off from the inside of the bowl q. . When there is an accumulation of condensate in the bowl: The float w rises due to its own buoyancy and the seal at the valve seat t is interrupted. The condensate inside the bowl q drains out through the knob y. Turning the knob y manually counterclockwise lowers it and causes the sealing action of the valve seat t to be interrupted, which allows the condensate to drain out.