CAT.No.CDM021E-1

SVP
Small Volume Prover

It is important that the original accuracy of a flowmeter is maintained as long as
the flowmeter is in operation. To achieve this, periodical meter proving must beconducted. This applies to every other flowmeter, as well as flowmeters that arelegally obligated to be proved periodically. We produce various types of meter
proving equipment by utilizing our manufacturing technology and know-how
obtained by having proving facilities as the production plant.
■FEATURES
１. Compact design allows space-saving and transportability.
２. The latest electronics technology allows precise time measurement and pulse counting as well as highly
accurate and efficient proving which requires less volume and flow pulse compared to conventional provers.
３. Computerized control enables complete automation, rationalization, and labor-saving.
４. Online central control is available.

Ever-increasing pricesof petroleum/chemical
products

Demand for improved meter
accuracy, especially forflowmeters used forcustody transfer

Demand for improved
accuracy of meter
error calibration

The small volume prover is developed based on our unique idea
and newest technology that completely changes the procedureof on-site meter error calibration.
Reliable calibration
procedure

Shorter operation time

Constant online
monitoring
Preventive
maintenance
Cost saving

SYSTEM DIAGRAM
Hydraulic Cylinder Support Plate
Magnetic Body
Omni Seal
PistonHydraulic Cylinder

Measuring Direction

N2 GasAir Hydraulic UnitAPPLICATIONSHigh accuracy with repeatability of 0.02%: suitable for custody transfer at petroleum complexes, etc.

Transportable structure: suitable for use in locations where fixed installation is difficult such as piers.

OPERATION EXPLANATIONSTEP0 HOME POSITIONSTEP3 Measuring Start
FlowMeasuring piston

Measuring rod

CylinderOpenOpenOpen

Return valve

Measuring rod pushes out themeasuring piston after the
return valve opens.

Close

Bypass valve

STEP1 Measuring Preparation 1

STEP4 Measuring in progress

Open
Cylinder pushes the measuringpiston to measurement standbyposition.

Open

Open

Close

STEP2 Measuring Preparation 2

STEP5 End of measurement

Close
Return valve closed

Open

Open
Close

GENERAL SPECIFICATIONS
Item

Description
100A P.P.

200A P.P.

300A P.P.

500A P.P.

Nominal size (mm)100200300485

Reference volume (Liter)

3.9

31.4

106462

Maximum flow rate (m3/h)

40

170

370

1000

Model

0.04

0.17

0.37

1Connection

2″(50A)4″″(100A)8″″(200A)

14″(350A)

Pipe2″, S/80

4″, S/40

8″, S/40

14″, S/40

Minimum flow rate (m3/h)
DiameterANSI 300#

Pressure rating
Operating temperature range−10 to +60℃

Press. difference at measurement

Max. 0.05MPa
1 mark, 2 sensors (magnetic)

Detector

Major parts
materials

Body

SUS316

Bypass

SUS304 or STPG
AluminumMeasuring piston

Carbon filled Teflon

Piston seal

SUS304Return cylinder

Hydraulic (air-hydro unit)

Cylinder drive

Within 0.02%Repeatability

ATEX Ⅱ1G Ex ia ⅡC T6

Explosionproof standard
Approx. dimension (mm)＊4600×900×1500＊＊Approx. weight (kg)

＊

＊

＊

＊

OUTLINE DIMENSIONS
Model: 200A P. P

280

300

300

120

Bypass Valve
4″3004″4″10004″4″

12004″

Hydraulic Cylinder

600

Detector Sw.

3008″

SVP Body

4600

700

900700

300

200

Base

1300

4200

2300

The specification as of June, 2015 is stated in this catalog. Specifications and design are subject to change without notice.
All copy rights of this catalog belong to OVAL Corporation and partial or all copy, transcription or reprint of the content without our permission is strictly prohibited.

3-10-8 Kamiochiai, Shinjuku-ku, Tokyo 161-8508, Japan
Tel. 81-3-3360-5121 Fax. 81-3-3365-8605

http://www.oval.co.jp/english
1506 (1509) −−−−S