Introduction
QSL/QSG Dual-line Distributor is a dedicated metering component independently developed by WEIDUN for dual-line centralized grease lubrication systems. With a maximum rated working pressure up to 40MPa, the whole solid monoblock structure delivers outstanding pressure resistance and durability. The series supports 2~8 grease outlets, each outlet pair equipped with visual indicator rods as standard; proximity switch monitoring function is optional for automatic signal feedback.
Technical Data
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Technical Data |
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Description |
QSL Dual-line Distributor |
QSG Dual-line Distributor |
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Rated Working Pressure |
40 MPa |
40 MPa |
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Working Temperature |
-35℃ ~ 80℃ |
-35℃ ~ 80℃ |
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Displacemen |
0~5 ml/cy (Adjustable) |
0~2.2 ml/cy (Adjustable) |
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Main Line Inlet Thread |
G3/8 |
G3/8 |
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Grease Outlet Thread |
G1/4 |
G1/4 |
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Applicable Grease Grade |
NLGI 0# ~ 3# |
NLGI 0# ~ 3# |
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Number of Outlets |
2 / 4 / 6 / 8 PCS |
2 / 4 / 6 / 8 PCS |
Features/Equipment characteristics
1.Adjustable Discharge Volume via Built-in Rotary Valve
Each pair of outlets is fitted with lockable rotary valve. Loosen the locking screw and rotate the valve by 90°, the two adjacent oil passages can be connected. Block one outlet with screw plug, the discharge volume of the remaining outlet will double. Quickly adjust single-point grease output on site without replacing the distributor body.
2.High-pressure Solid Block Structure, Long Service Life
Integrated solid valve block design, no split plate assembly leakage risk. Stable operation under 40MPa high back pressure, convenient grease replacement without disassembly of the whole valve body, effectively reducing maintenance downtime.
3.Wide Temperature Adaptability for Complex Working Conditions
Stable performance within -35℃ low-temperature cold regions to 80℃ high-temperature industrial environments, compatible with all-season construction machinery, metallurgical and port heavy-duty equipment.
4.Dual Monitoring Configuration for Flexible Status Feedback
Standard visual indicator rod for manual on-site inspection of piston reciprocating action; optional proximity switch to realize electrical signal remote monitoring, which can be linked with PLC to alarm system blockage faults automatically.
5.Convenient Cross-system Switching & Simple Installation
External reversing screw plug design supports quick cross-system flow switching. Standard G thread inlet and outlet interfaces, unified mounting hole layout, easy pipeline connection and fixed installation.
Our Advantages
1.On-site Adjustable Quantitative Output, Strong Customization Capacity
Unique rotary valve confluence technology realizes double flow adjustment without changing valve body specifications. 2~8 outlets optional, two displacement series to match light/heavy load lubrication points, flexible to meet different grease demand of each friction pair.
2.Integrated Monoblock Design, Low Leakage & Low Maintenance Cost
One-piece solid valve block eliminates inter-plate sealing leakage points; internal piston, steel ball and O-ring wearing parts are universal, only disassemble single metering unit for cleaning when blocked, no need to replace the whole distributor.
3.Dual Monitoring Solutions for Intelligent Lubrication Management
Visual indicator rod for field inspection, proximity switch for automatic electrical monitoring. Timely feedback of piston failure and pipeline blockage, avoid equipment wear caused by long-term lack of lubrication, extend mechanical component service life.
4.Strict Lubricant Compatibility Specification to Protect Components
Clear prohibition of graphite, molybdenum disulfide, calcium carbonate, calcium hydroxide and graphene-containing grease. Hard solid particles will cause piston jamming and seal abrasion; graphene grease will halve the product warranty period, effectively guide users to select matching lubricants.
FAQ
Q1: How to adjust the single outlet discharge volume of QSL/QSG?
A1: Loosen the rotary valve locking screw, rotate the rotary valve 90° to open the connecting passage between two outlets, plug one outlet with screw plug, the other outlet will output double grease volume. Restore the rotary valve to the original position and remove the plug to return to standard single-point flow. Do not block both outlets of one pair at the same time, otherwise piston jamming fault will occur.
Q2: In first commissioning, inlet has pressure but no grease flows out of outlets, what are the troubleshooting steps?
A2: 1. Check whether the inlet connector contains built-in check valve, replace unobstructed inlet joint; 2. Confirm outlet check valves are assembled in correct direction; 3. Check if the rotary valve merging operation and screw plug installation are correct; 4. Disassemble piston assembly for cleaning to eliminate piston stuck caused by dirt or dried grease.
Q3: What types of grease are forbidden for QSL/QSG dual-line distributors?
A3: Grease mixed with graphite, supramoly, calcium carbonate, calcium hydroxide or graphene is prohibited. Hard particles will accelerate piston and seal wear, easily cause blockage failure; equipment using graphene grease will enjoy half the original warranty period only.
Q4: What is the routine maintenance cycle of the product?
A4: Daily check the action status of indicator rod; clean internal pistons and replace aging O-rings every 3~6 months according to dust, high temperature and other working conditions. When replacing different types of grease, fully disassemble and clean the whole distributor to avoid grease mixing failure.
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