CIP Pumps: Frequently Asked Questions
Some of the pumps Tapflo supplies are labelled as CIP - ever wondered what this means? The Tapflo Team are here to help! We've put together a list of our most frequently asked questions on CIP Pumps and provided a case study to ensure you know all you need to know about CIP Pumps! If you have further queries, don't hesitate to contact Tapflo UK!
What is CIP?
CIP is the abbreviation for “Clean In Place”, which means the cleaning in place of the vessels, equipment and pipework that come in contact with the product, without dismantling. This involves the pre-rinse, cleaning, final rinse and sterilisation of a hygienic process, which can be done at temperatures up to 85ºC and involves either acid or caustic detergents with numerous sanitisers. CIP Systems can be either “Single Use”, where the CIP fluid is wasted at the end of each use, or “Recovery” based where the fluid is recycled for re-use for further cycles.
What types of pumps can I use for CIP?
CIP Pumps are required to be hygienic and in compliance with FDA regulations and typically EHEDG certified, in order to ensure the CIP process is as sanitary as possible. Centrifugal Pumps are typically used as they are ideally suited to supply fairly large volumes of water like fluids at reasonable pressures, up to approx. 16 Bar. Furthermore, most hygienic pumps in contact with the product are typically positive displacement pumps which are not suited to pumping water or at the capacities required for a CIP process. However, we can also supply our PDSP Hygienic Twin Screw Pumps to pump both the product and the CIP fluid in both supply & scavenge applications, simplifying the process and negating the need for extra pumps in the process.
Where are pumps found in the CIP process and what are they used for?
CIP systems feature at least 2 types of pumps in 2 different positions. The first is the CIP Supply Pump, generally a Hygienic End Suction Centrifugal Pump, which pushes the CIP fluid round the process. The CIP Supply Pump typically does 2 feeds a spray system in a process vessel with large volumes of the CIP fluid at fairly high pressures, depending on the type of spray heads used (Static Spray Balls, Rotating Spray Heads or Cleaning Machines). The second is the CIP Scavenge and/or Return Pump which evacuates the CIP fluid from the process vessel and pipework and either pumps it to waste or returns it for recycling and re-use. These are generally Hygienic Self Priming Centrifugal Pumps (see CPC-ZA or CTS-H pumps) or Hygienic Liquid Ring Pumps (see SP-LR Pumps).
How do I quantify my CIP flow rate requirement?
The flow requirement for CIP is determined by the minimum velocity required through the size of pipework in place. This is typically 1.5 m/s minimum. As such your CIP flow requirements can be quantified as follows:
|Process Pipe ø, mm||CIP Supply Return Pipe ø, mm||Minimum CIP Flow, m³/hr|
Tapflo CIP Pump Case Study:
Tapflo Pumps UK were recently contacted for the supply of a hygienic pump for use on both liquid stock and CIP, as they wanted to simplify their CIP pipework and limit the amount of pumps they have on site, therefore limiting spares holding and maintenance times & procedures. We at Tapflo UK were only too happy to help!
Fluid: Liquid Stock
Viscosity: 1-2000 cPs
S.G: 1.1 kg/dm³
Required Capacity: 30 m³/hr @ 2 Bar (Liquid Stock) & 50 m³/hr @ 2 Bar (CIP)
Suction Conditions: 200 mBar vacuum on evaporator tank (Liquid Stock Duty)
Required Connection Type: DN100 / 80 Tri-Clamp
Pipework Size: Sized to suit pump
Motor Supply: 230-400V or 400-690V / 3 Ph / 50 Hz
Model: PDSP 3-60
Description: Long Coupled, Hygienic Self Priming Screw Pump (Double Screw)
Rated Capacity: 30 m³/hr @ 2 Bar (40 Hz) & 50 m³/hr @ 2 Bar (70 Hz)
DN100/DN80 Tri-Clamp Counter Connections w/ Weldable Counter Parts
SS 316L Wetted Components, 0.8 Ra Surface Finish w/ Hardened Screws
SS 304 Gearbox
Single Mechanical Seal, SiC/SiC/EPDM Elastomers (FDA Approved)
Motor 15 kW/4 Pole/400-690V/3 Ph/50-60 Hz/IP55/Class F/IE3 Premium Efficiency Class
The pump was delivered within 6-8 working weeks and the customer was over the moon with the performance on both process and for CIP pumping.
If you require a similar pump or any assistance on fluid handling within your factory then please get in touch on 02380 252 325 or email us at [email protected]