The pneumatically operated positive displacement metering pumps can provide accuracies upto +/-2% satisfying API-675 standards.
Flow Turn Down Ratio :
Since metering pumps offer both stroke rate and stroke length adjustment, flow turn down ratios as great as 100:1 can be achieved.
These pumps can produce 10,000psi with only 100psi of air/gas supply pressure owing to the large differences in area between the air/gas piston and the plunger.
Plungers made of SS316 or ceramic with PTFE seals provide maximum corrosion resistance. Special materials such as Hastolly are also offered.