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The Cemline Piston Powered Condensate Pump is uniquefrom the other non-electric condensate pumps in that it is springless. Thisupdated reliable springless design uses a dual piston type configuration thatacts as a spool selector to shift the valve positions. The pump is able to workwith up to 250 PSI motive steam pressure. It can operate from almost no loadto it’s rated maximum capacity. The piston powered condensate pump haseasy maintenance, is interchangeable with most current spring pumps out onthe market today and is made of all stainless steel components. This designsolves the poor reliability issue of the spring snap mechanism of the past. In addition, the piston powered condensate pump due to a larger orifice,less friction and longer travel, has an increased capacity over the springmechanism pumps. This may allow for a smaller pump than before thereforesaving you valuable space and money.
The below illustrations demonstrate how non-electrical condensate pumps work during the three step process of moving condensate.

 Step 1. Fill Stage  Step 2. Dishcarge Stage  Step 3. Equalization Stage
step 1-non electric  step 2-non electric  step 3-non electric
Gravity causes condensate flow from the receiver tank through the inlet check valve into the pump tank. At this point the outlet check valve and the motive force valve are closed. The vent valve is open allowing for equalization of pressure between the receiver and the pump tank. The condensate fills the pump tank until the pump mechanism opens the motive force valve and simultaneously closes the vent valve.With the motive force valve open, the pump tank begins to pressurize as the motive force pressure becomes great enough to close the inlet check valve. When the pressure in the pump tank becomes greater than the pressure at the outlet check valve, the outlet check valve opens and condensate is discharged from the pump tank into the condensate return piping. Because the inlet check valve is closed condensate is stored in the receiver tank. The condensate is pumped out and reaches a low level causing pump mechanism to close the motive force valve and open the vent valve. The outlet check valve closes when the pressure in the pump tank is less than that of the outlet line. At this time the inlet check valve is also closed. Then the pressure in the pump and the receiver equalize so that the inlet check valve will open and the fill cycle will begin again.

The illustrations below demonstrate how the springless piston powered 
non-electrical condensate pumps work during the four step process of moving condensate.

 ccp phase1  ccp phase2
At the beginning of the cycle, the pump is empty, the float and the connected primary piston are in the down position and the secondary piston is to the left. Filling the pump with liquid gradually raises the float and the primary piston simultaneously. When the tank is filled the float rises until it reaches to the top of its travel causing the connected primary piston to open the port, which directs the motive pressure to the left side of the secondary piston pushing the secondary piston to the right.
 ccp phase3  ccp phase4
With the secondary piston pushed all the way to the right, the motive pressure pathway to the vessel is open allowing motive pressure to pressurize the tank. Pressurizing the tank forces the liquid to flow from the vessel through the outlet check valve into the condensate return piping. In the final phase, the float and primary piston fall as the motive pressure has forced the liquid out of the vessel. When the float and connected primary piston reach the bottom of their travel, the primary piston opens the port that directs the motive pressure to the right side of the secondary piston. The motive pressure pushes the secondary pressure to the left preventing motive pressure from entering the tank and opening a pathway between the tank and the vent. Finally, the vessel’s pressure is vented and the unit is ready to fill and repeat the cycle.