Overview
Codip air operated tubular diaphragm pumps combine an innovative pump design with a robust construction using durable materials. The result is a pump providing safe and reliable liquid transfer even when handling the most aggressive media. These tubular diaphragm pumps resist the effects of viscous, abrasive and corrosive fluids.
The tubular diaphragm, which is 'the heart' of the system, operates with the process medium inside, and inert liquid outside, at the same internal and external pressure so this diaphragm is hydro-dynamically balanced. This means that the differential pressure acting on the tubular diaphragm walls is always zero, therefore eliminating any diaphragm stress and resulting in an extremely long tubular diaphragm life.
In the Codip pumps with PTFE wetted parts, all component parts that come into contact with the pumped medium are isostatically moulded from pure virgin PTFE. The pump has no mechanical seal, packing or o-rings that seal the pumped liquid from the environment, and it is therefore virtually impossible for the Codip pump to leak any pumped liquid into the environment.
The fact that the pump has secondary containment is another important feature of the Codip design which addresses the growing demand for sealless pumps and ensures zero leakage even in the unlikely event a diaphragm failure.
Specifications
| Model | Maximum Flow
Rate (1)
(l/min) | Flanges(2)
(mm) | Minimum Suction
Pressure (3) (bara) | Maximum Discharge
Pressure (barg) |
|---|
| RP20 |
20 |
25 |
0.35 |
10 |
| RP60 |
60 |
50 |
0.5 |
10 |
| RP 60 Duplex |
120 |
50+50 |
0.6 |
10 |
| RP150 |
150 |
80 |
0.4 |
10 |
| RP 150 Duplex |
300 |
80+80 |
0.5 |
10 |
Notes:
- The above mentioned capacities are based on 18°C water and a driving-air pressure of 3 bar, with 10 m.l.c. discharge head and 1 metre negative suction head. The effective flow rate of any given system depends on both the nature of the pumped fluid (viscosity-density-vapour pressure) and most important the layout of the suction piping (geometric pumped height-size-length volume and friction losses, etc.)
- Flanges are normally DIN 2532 ND 10 or ANSI 150 lbs. Other standards can be supplied.
- The above data is obtained under self-priming conditions with PTFE 'shuttle' valves for the RP 20 model and for RP 60 Simplex and Duplex models, with standard PTFE ball check valves for RP 150 Simplex and Duplex models.
- Duplex pumps are normally supplied without inlet and outlet manifolds. These manifolds can be supplied if required but normally it is more efficient to include them into the piping scope.
OPTIONS
SD Range
The SD design of Codip pumps are suitable for process liquids containing solids where PTFE wetted parts are required. The special PTFE tubular diaphragm is designed for slurries and liquids containing solids and does not incorporate any spacers hence reducing the number of flow restrictions in the pump. Glass filled PTFE balls and seats are used in the SD design to minimise the effects of abrasion while offering the maximum resistance to corrosion. Liquids with up to 50% solid concentration with particles up to 7 mm can be successfully pumped with the Codip SD Range.
SH Range
THE SH range incorporate PTFE shuttle check valves which are more efficient than standard ball check valves. This allows better seating of the valves and so improves the efficiency of the pump and reduces the chance of the pump losing prime. By using PTFE shuttle valves, the dry lift capability of the Codip models increase to 3.5 metres for the model RP20 and 6 metres for the model RP60 Duplex. The check valves are designed to minimise friction losses and so wear on the PTFE balls and seats is minimised.
HC Range
The HC range of Codip pumps incorporate an integral 316 stainless steel heat exchanger for processes where the pump medium has to be kept at a constant temperature. The heat exchanger is positioned inside the pump body, fully immersed in the inert liquid and surrounds the tubular diaphragm. The heat exchanger can be heated or cooled using oil, water, steam or any heat transfer medium. No form of external heating/cooling or trace heating of the pump is required.
