Z-Model Sliding Vane Pump Overview
The Z-Series Coro-Vane® pumps, the newest line of sliding vane pumps offered by Corken, are designed with our patented needle roller thrust bearing rated for 4,000 lbs. The needle roller thrust bearings protects the pump against dynamic impact loads imposed on the pump by the drive system. Premature failures due to axial thrust loads are minimized on truck applications. They have O-ring construction throughout and are rated for 400 psi (28.6 bar) working pressure. Since the Z-models sliding vane pumps are used primarily in LPG (propane & butane) and agricultural ammonia applications, the non-adjustable internal relief valve is pre-set at the factory.
When the application requirements are suitable, Z-model pumps are a great option for many other liquefied gases with high vapor pressures such as natural gas liquids (NGLs), refrigerants, CO2, and many more. Applications include bulk pump transfer, propane delivery truck and transport. Available in 2”, 2.5”, 3” and 4” sizes.
Operating Specifications
- Flow rates up to 385 gpm (1,457 l/min)
- Working pressures up to 400 psi (27.6 bar)
- Differential pressures up to 125 psi (8.6 bar)
- Temperature range: -25 to 225 °F (-32 to 107 °C)
- Viscosities up to 20,000 SSU (4,250 cSt)
The SC-model side channel pump is a mechanically sealed design and is the standard seal option for propane, butane, and agricultural ammonia service. There are three mechanical seal options (single unbalanced, single balanced, and double balanced) and two material options for the seal face and seal seat. The side channel pump is a self-priming design so it is ideal for applications with a low net positive suction head (NPSH) such as pumping from a small underground tank. Additionally, the multi-stage configuration enables the side channel pump to reach higher than normal differential pressures. The feature makes it a great fit for high different applications like propane carousel cylinder filling station, aerosol filling stations, vaporizer feed, selective catalytic reduction (SCR) applications.
Corken’s regenerative turbine pump is known as a Coro-Flo® and has a strong reputation in the LPG industry for being a long lasting pump. The free-floating impeller minimized wear and delivers years of trouble free service. The Coro-Flo turbine pump is a continuous duty pump and is an excellent choice for lower flows and moderate to high differential pressures. The liquid is circulated between the teeth of an impeller that rotates between the pump casing and head. Since the Coro-Flo is designed with a free-floating impeller, there is no metal-to-metal contact so maintenance requirements are minimized.
Corken’s positive displacement sliding vane pump, known as a Coro-Vane®, is an excellent choice for propane, butane, and agricultural ammonia applications. The self-adjusting sliding vanes improve the pumping efficiency and help extend the life of the pump. On the standard LPG and Z-model pumps, the cam and sideplates are replaceable. The rotor, cam, sideplates, seals, and bearings are easily replaced by simply removing the pump cover. All of our propane, butane, and agricultural ammonia sliding vane pumps are equipped with a non-adjustable internal relief valve that is pre-set at the factory.
Corken offers a positive displacement sliding-vane, regenerative turbine and side channel design for a wide variety of LPG and agricultural ammonia applications. Each technology serves a wide range of differential pressures and capacities for bulk plant, and propane delivery truck and transport applications. To find an LPG pump for your application, click on one of the product lines listed below.
Corken offers several models of vertical and horizontal reciprocating compressors to meet the stringent demands of today’s LPG industry. Depending on your leakage requirements, each model can be configured in either a plain style, D-Style or T-Style. To find an LPG reciprocating compressor for your application, click on one of the product lines listed below.
Corken’s regenerative 
