Traditional mechanical flowmeters, such as turbines and PD meters, are usually calibrated in the field when the product properties change. The main reason is that product viscosity directly affects the measurement error of these mechanical flowmeters. To eliminate this viscosity dependency, mechanical meters are usually calibrated on the actual product and operational flow rate using an on-site ball prover.
KROHNE Ball provers come fully equipped, including third party certification and training, and are used by many major oil companies and calibration providers. Ball provers are supplied as standalone systems or can be fully integrated into the metering system. Using a low-friction baked phenolic lining and a proprietary design of micro set sphere detector assures best-in-class prover performance with excellent chemical and abrasion resistance. KROHNE has been providing ball provers since more than 35 years. Modern flowmeters that have no moving parts do not have the same viscosity dependency as mechanical meters. Nevertheless specifications could still call for on-site proving. In this case a combination of KROHNE ultrasonic or Coriolis flowmeters can be provided, in combination with a ball prover.
Low-friction baked phenolic lining with excellent chemical and abrasion resistance
Proprietary design of micro set sphere detector assures best-in-class performance
Fully wired, pre-configured and tested
KROHNE offers support during all project phases - from fundamental design choices during FEED, up to commissioning and on-site training and service
Site installation coordinated through one of our 100 local offices
Custody transfer flow metering systems
Allocation and high-accuracy process measurement
Prover sphere detector for the oil and gas industry
Ball prover detector switch with enhanced repeatability in excess of API Chapter 4, for greater control on metering accuracy
One model fits all prover pipes from diameters 3...36"
Quick change-out, no need for prover re-calibration
With stainless steel wetted parts, suitable for most products