Introduction 株式会社フロム 渋谷大介大野洋平舟越省司 南部浩章関口陽子 Micro Pump without use of check valves to achieve no pulsation flow JM Science Inc ID: 581691
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Slide1
Current pump plungers are designed to operate continuously in high pressure and high performance environments including analytical applications in chemical synthesis, reaction chemistry and HPLC. Controlled and precise flow can be affected by check valve design and performance.
Introduction
株式会社フロム 渋谷大介、大野洋平、舟越省司、
○
南部浩章、関口陽子
Micro Pump without use of check valves to achieve no pulsation flow
JM Science Inc.
www.jmscience.com
Authors: Satoshi Nakamura,
Takafumi
Shimizu and Ken Kitamura, FLOM Corporation
2408
Bedell
Rd. Grand Island, NY 14072 (716) 774-8706 sales@jmscience.com
Methodology
Result and Discussion
Pump
+
Valve
Pump
Uncertainty of check valve is now resolved with using switching valve!
Valve
In this report, we describe the development of a micro flow pump with a target flow rate range less than 1.0mL/min. With applying an ultra high durability switching valve which passes 1,000,000 cycles in 2-position switching operation and linear drive pump which has 10mm long plunger stroke with real time pressure monitoring function. The result has been the elimination of the backlash and flow fluctuation contributed by the check valve.
This new pump, which has a flow rate increment of 1.0
uL
/min, is recommended for analysts who require the ultimate in precision with virtually no pump pulsations.
1. Name of Component Parts
Left :
Right :
Left :
Right :
4-port Switching Valve
/ Inlet port
(Substitute Using Check Valves)
Pressure Sensor for Primary Pump
Pressure Sensor for Secondary Pump
/ Outlet Port
Primary Pump Head
Secondary Pump Head
Inlet port
Outlet port
Direction of flow
2. Principle of Operation
①
Position of Switching Valve
Direction of Plunger Motion
②
Position of Switching Valve
Direction of Plunger Motion
③
Position of Switching Valve
Direction of Plunger Motion
Direction of Plunger Motion
Direction of Plunger Motion
Direction of Plunger Motion
Suction
Compression
Discharge
Description of procedure
Position of Switching Valve
Direction of Plunger Motion
Primary Pump Head
Secondary Pump Head
Pressure (=Flow Volume)
Primary Pump Head
Secondary Pump Head
Product Name
Linear Drive Pump with Switching Valve
Specifications
Maximum Pressure
350 bar (5075 psi) as expected
Flow Rate Range
0.1
uL
~ 999.9
uL
/ Min.
Test data will be attached in here.
Flow Accuracy
±0.3 %
Pump Driving Method
Linear Drive
Plunger stroke
10 mm
Pressure Accuracy
<
5 %
Features
Flow Volume Calibration, Upper/ Lower Pressure Limiter
Wetted Materials
Stainless Steel (SUS 316), Sapphire, Ruby, PTFE, PCTFE, Teflon Elastomer, High-density Polyethylene
Remote Control
Input: Pump On/ Off, Output: Error Signal
Communication
RS232C
Dimensions
130 (H) x 160 (W) x 280 (D) mm
Weight
Approximately 7 Kg
Advantages
Check valve malfunction has been eliminated
No flow fluctuation
Reduced maintenance
Flow rate selectable in 1
uL
/min.
Can be used with high density solvents
Daily display of prototype at FLOM Corporation (Booth #5153)