KR-722D Tunnel Shield Grease Pumpability Capillary Rheometer

Capillary Rheometer
Capillary Rheometer
Capillary Rheometer
Capillary Rheometer
Capillary Rheometer
Category

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RIGHT combines the U.S. standard ASTM D1092 and domestic capillary rheometer for integrated and innovative instrumentation, which greatly improves the overall performance of shield tail sealing grease and provides effective testing equipment for further product development. Under the specified conditions, the flow rate of grease through a certain aperture capillary tube, expressed in g/min. Accurate equipment than the butter gun only qualitative and not quantitative. Provides an effective solution to compare the pumpability difference of different brands of grease and monitor the stability of different batches of products in our factory. Provide theoretical support to change the formula for different seasons in different regions.

Product Details：

Capillary Rheometer

The KR-722D dedicated capillary rheometer is professionally developed for quantitative pumpability testing of shield tail sealing grease in underground tunnel construction. Designed combining ASTM D1092 international grease viscosity standard and domestic engineering material test specifications, the system simulates actual on-site pressure injection conditions of tunnel shield equipment, accurately measuring grease extrusion flow rate (g/min) through standard capillary dies to evaluate its pumping performance, adhesion and sealing lubrication capacityASTM Inter….
Different from simple manual extrusion tools that only deliver qualitative judgment, this full-automatic servo testing equipment realizes full digital collection of pressure, displacement and temperature data. It generates standardized test reports to support raw material incoming inspection, batch stability monitoring and seasonal formula adjustment for shield grease manufacturers, tunnel engineering construction units and third-party geotechnical material certification labs.

Capillary Rheometer

Core Product Competitive Advantages

  1. Simulated Real-Working Constant Pressure Extrusion System

    Equipped 5KN high-stability servo drive module, adjustable test pressure ranging from 0.5–5MPa, perfectly reproducing the actual pumping pressure environment inside tunnel shield wire brush gaps. High-precision pressure sensor with 0.05MPa resolution records real-time extrusion resistance, eliminating data deviation caused by unstable manual pressing of traditional test tools.

     

  2. Precise Constant Temperature Circulation Control Unit

    Matched independent refrigerated circulating temperature control cabinet, working temperature covers 20–50℃ with ±1℃ accuracy and 0.1℃ display resolution. Heating rate adjustable from 1–5℃/min, simulating high-temperature underground tunnel working conditions and low-temperature winter construction environments to test grease flow performance under variable ambient temperatures.

     

  3. Standard Ra0.4 Precision Capillary Die Kit

    Comes with two sets of Φ3.8mm standard extrusion dies with ultra-smooth inner surface finish. The die roughness strictly complies with industry test norms, avoiding grease adhesion and blockage during extrusion to guarantee stable and repeatable flow rate test results between parallel samples. Supporting complete matched piston, charging barrel and auxiliary scraping tools for quick sample preparation.

  1. Full Digital PC Data Acquisition & Analysis Software

    Support real-time synchronous recording of displacement, pressure, temperature and extrusion duration. The built-in algorithm automatically calculates core indexes including grease flow velocity, unit-time output and apparent pump viscosity, drawing intuitive flow characteristic curves. Batch data storage, multi-group curve overlay comparison and one-click printable formal inspection reports are available for engineering filing and product certification submission.

     

  2. Integrated Safe Human-Machine Operation Layout

    The stand-alone test host adopts rigid thick steel frame structure with maximum 250mm piston travel, equipped emergency stop button and running status indicator lights. The temperature circulation cabinet is independently separated to avoid heat interference to the testing mainframe; all operating buttons are centralized on the front panel with clear marking, lowering the operation threshold for factory QC inspectors.

     

  3. Complete Matching Accessories, Ready-To-Use After Delivery

    The full delivery package includes all test consumables without extra procurement, such as standard charging barrels, precision extrusion dies, sample filling piston and cleaning tools. The whole machine weighs only 300kg with compact overall size, suitable for factory quality control rooms and engineering material testing stations with limited space.

Capillary Rheometer

Complete Technical Parameter Table

Parameter Item KR-722D Standard Specification
Temperature Control Scope 20 ~ 50℃, control precision ±1℃
Temperature Adjustment Rate 1 ~ 5℃/min stepless adjustable
Temperature Display Resolution 0.1℃
Test Pressure Range 0.5 ~ 5 MPa
Max Servo Driving Force 5 KN
Pressure Test Precision ±0.5% Full Scale
Pressure Resolution 0.05 MPa
Load Force Resolution 0.1 N
Piston Displacement Range ≤ 250 mm
Displacement Resolution 0.06 mm
Adjustable Loading Speed 0.01 ~ 500 mm/min
Standard Capillary Die Spec Φ3.8 mm, surface roughness Ra0.4, 2 pcs supplied
Standard Piston Diameter φ44.83 mm
Overall Machine Dimension 630 × 400 × 1900 mm
Total Net Weight 300 KG

Standard Complete Test Operation Process

  1. Preheating Equipment & Pre-Sample Treatment
    Turn on the circulating temperature cabinet, set target test temperature and keep constant for 30 minutes. Take shield sealing grease sample and stir evenly to eliminate internal bubbles and agglomerates that affect extrusion flow data.
  2. Sample Filling & Die Installation
    Disassemble the charging barrel, fill grease uniformly without voids, install the standard Φ3.8mm capillary die at the bottom and lock the assembly on the test bench.
  3. Test Parameter Configuration On PC
    Connect the host to the matched industrial computer, set target pressure, constant temperature holding time and extrusion recording duration according to engineering test requirements, save custom test recipe for repeated batch detection.
  4. Automatic Constant Pressure Extrusion Test
    Start the servo drive program; the piston pushes the grease sample through the standard die under stable preset pressure. The system continuously records extrusion time and discharged grease mass in real time.
    image
    Extrusion Test Sample
  5. Pumpability Index Calculation & Report Export
    After the extrusion cycle ends, the software automatically calculates the grease flow rate (g/min) and apparent pumpability coefficient. Operators can overlay multiple batch curves for comparison and print formal test reports directly.
  6. Post-Test Cleaning & Equipment Shutdown
    Cool the test cavity to room temperature, disassemble the charging barrel and capillary die, thoroughly wipe residual grease with dedicated cleaning tools, cut off temperature circulation and main power supply to finish daily testing workflow.

Capillary Rheometer

Main Application Industry & Test Objects

Tunnel & Underground Engineering Construction Units

Test shield tail special sealing grease used for subway, highway tunnel and underground pipe jacking projects; evaluate pumping smoothness under different seasonal temperatures to avoid construction blockage of grease injection equipment.

Shield Grease Manufacturing Factories

New grease formula R&D, raw material batch incoming inspection, finished product factory quality control; compare pumpability differences of different thickener and base oil formulations to optimize product construction performance.

Geotechnical Material Third-Party Testing Institutions

Carry out standardized compliance testing of tunnel shield grease per national engineering material standards, provide official test data for project bidding and acceptance reports.

Lubricant & Grease R&D Laboratories

Research the flow and extrusion characteristics of high-viscosity sealing lubricants, analyze the influence of additives on pump performance under variable temperature and pressure conditions.

Capillary Rheometer

Standard Factory Full Delivery Kit

  1. KR-722D pumpability rheometer main servo test stand
  2. Independent circulating constant temperature refrigeration cabinet
  3. Two sets of standard Φ3.8mm Ra0.4 capillary extrusion dies
  4. Standard charging barrel, sample filling piston and disassembly tools
  5. Industrial control desktop computer + dedicated grease rheology analysis software
  6. Emergency stop safety assembly and running status indicator control panel
  7. Multilingual operation manual aligned with ASTM D1092 and engineering material test standards
  8. Factory dimensional & pressure calibration inspection certificate

Capillary Rheometer

Global Distributor & After-Sales Support

We provide one-on-one remote test operation training and shield grease test parameter debugging guidance, with long-term stable supply of replacement capillary dies, servo drive assemblies and temperature sensors. Custom special size dies and 60Hz overseas voltage conversion versions are available for bulk orders. Exclusive regional agent policies include priority production scheduling, OEM private brand customization and full sets of HD product marketing pictures.

English Overlay Text For All Product Pictures

Main Banner Title: KR-722D Tunnel Shield Grease Pumpability Capillary Rheometer ASTM D1092 Compliant

Control Panel Tags: TEMP SET / PRESSURE ADJUST / SPEED RANGE / DATA CURVE / REPORT PRINT

Feature Overlay Tags: 5KN Servo Drive / 20-50℃ Circulating Temp Cabinet / Ra0.4 Standard Capillary Die / PC Automatic Flow Calculation / Simulate Tunnel On-Site Pumping Condition

Safety Operation Tip: Clean Grease Residues Completely After Each Test To Prevent Die Blockage

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KR-722D Tunnel Shield Grease Pumpability Capillary Rheometer

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