High Pressure Metering Pump
Precision chemical dosing requires absolute volumetric repeatability under high-pressure operating conditions. This equipment delivers controlled flow rates against discharge pressures up to 1000 bar, meeting API 675 performance standards for industrial fluid injection.
Technical Specifications
|
Parameter |
Specification Range |
Standard Compliance |
|
Max Discharge Pressure |
Up to 1000 bar (14,500 psi) |
API 675 |
|
Flow Rate |
0.5 L/h to 5000 L/h per liquid end |
ISO 9001 |
|
Dosing Accuracy |
+/- 1% (from 10% to 100% stroke length) |
CE, ATEX (Optional) |
|
Stroke Adjustment |
0-100% manual, pneumatic, or electric actuator |
NEMA / IEC Motors |
|
Fluid Temperature |
-40°C to +150°C |
NACE MR0175 (Optional) |
Configuration & Selection Guide
Selecting the correct model requires evaluating system backpressure, fluid viscosity, vapor pressure, and chemical corrosiveness.
Liquid End Configurations
• Plunger Type: Direct displacement design utilized for non-hazardous, clean chemicals and high-pressure requirements. Solid ceramic or hard-chrome plated stainless steel plungers minimize abrasive wear.
• Hydraulic Diaphragm Type: Hermetically sealed double-diaphragm design with a built-in rupture detection system. Recommended for toxic, flammable, or high-purity chemicals where zero leakage is mandatory.
Materials of Construction (Wetted Parts)
• Standard: 316L Stainless Steel
• Corrosive Service: Alloy C276, Alloy 20, Titanium, or PTFE-lined heads
• Seals: FKM, EPDM, FFKM, or PTFE packed rings depending on chemical compatibility
Industrial Applications
Oil & Gas Extraction: Continuous injection of corrosion inhibitors, demulsifiers, and oxygen scavengers into wellheads and subsea pipelines.
Chemical Processing: Metering precise ratios of catalysts, reactants, and acids into pressurized reactors.
Power Generation: High-pressure boiler feedwater treatment, dosing hydrazine, ammonia, and phosphate solutions against drum pressures.
Water Treatment: Dosing coagulants, flocculants, and disinfectants in high-pressure reverse osmosis (RO) systems.
Manufacturing & Quality Control
Reliable field performance relies on strict machining tolerances and material traceability. Production processes utilize vertical CNC machining centers for liquid end blocks, ensuring internal port alignment and eliminating dead zones where fluid can trap and degrade.
Material Verification: Positive Material Identification (PMI) testing is performed on all alloy wetted parts (316L, Hastelloy, Titanium) prior to machining.
Pressure Testing: Every assembled liquid end undergoes hydrostatic testing at 1.5 times the maximum rated working pressure for 30 minutes in accordance with API standards.
Performance Testing: Pumps are run on closed-loop test benches to verify flow linearity, stroke adjustment repeatability, and volumetric efficiency before dispatch.
Frequently Asked Questions
Q: How is dosing accuracy maintained when operating at low stroke percentages?
A: Accuracy is maintained through a precision variable eccentric drive mechanism (micrometer screw) that adjusts plunger travel without altering the reciprocating profile. Calibration verification is recommended if operating continuously below 10% stroke length.
Q: What mechanism prevents process fluid contamination if a diaphragm fails?
A: Hydraulic diaphragm models utilize a dual-diaphragm configuration with an intermediate fluid layer. A pressure switch or optical sensor monitors the intermediate chamber; if the primary diaphragm ruptures, the sensor detects the fluid displacement and triggers an immediate system shutdown or alarm.
Q: Are motors and electrical enclosures certified for hazardous area installation?
A: Motors and actuators are available with ATEX Zone 1/2, IECEx, or Class I, Division 1/2 explosion-proof certifications based on facility classification requirements.
Q: What is the lead time for standard versus custom metallurgy configurations?
A: Standard 316L configurations ship within 4 to 6 weeks. Units requiring exotic alloys such as Titanium or Alloy C276 require 8 to 12 weeks due to raw material sourcing and PMI verification protocols.
Hot Tags: high pressure metering pump, China high pressure metering pump manufacturers, suppliers, factory
Previous
No InformationYou Might Also Like
Send Inquiry