Dip and Draw Mechanical Bar Screen
Advanced Front-Raked Screening with Above-Water Mechanism
Overview
The Dip and Draw Mechanical Bar Screen is a next-generation evolution of the conventional fixed bar, front-raked screen. Designed for smooth operation, high cleaning efficiency, and minimal maintenance, it addresses long-standing issues associated with traditional screening systems by keeping the entire raking and transmission mechanism above the waterline.
All wetted and dry parts are typically constructed in full stainless steel (SS304, SS304L, SS316, SS316L, or Duplex). For budget-sensitive projects, carbon steel may be optionally used for dry, non-contact components, offering a typical service life exceeding 5 years.
The Dip and Draw screen is not an experimental offering — it is a field-proven technology with numerous successful installations across varied site conditions. We offer up to 10 years of warranty on all in-house manufactured components (excluding motors, gearboxes, and control panel internals supplied by third-party OEMs).
While engineered to outperform conventional systems, the Dip and Draw screen remains highly competitive in pricing compared to other front-raked mechanical screens from established manufacturers. Our focus is on delivering transparent, lifecycle-based value and ensuring consistent quality across all installations.
Powered by CDCARM™ Technology
Chain Driven CAM Actuated Raking Mechanism (CDCARM™)
Patented. Powerful. Performance-Focused.
-
Faster Cleaning Cycles: High-speed single rake operation matches or exceeds multi-rake systems.
-
Heavy-Duty Raking: Handles coarse and floating debris effectively.
-
Spring-Loaded Raking Arm: Applies downward force for deep scrubbing. Bucket backing prevents roll-off.
-
Inertia-Based Debris Discharge: No scraper mechanism required.
-
Chain-Driven, CAM-Guided Motion: CAM provides pathing; chain transmits power — ensuring reliability.
-
Above-Water Operation: Keeps all moving parts dry and accessible.
-
Minimal Moving Parts: Only six guide wheels, reducing friction and maintenance.
-
Structurally Safe Under Jamming: Low torque operation avoids structural damage.
-
Engineered with Purpose: Not just simple — engineered for performance and longevity.
-
Low Energy, High Impact: Efficient operation using 0.75 to 2.2 kW motors.
Hydraulic & Installation Performance
-
Maximized Flow Area: No submerged components — more open bar space, higher capacity.
-
No Permanently Submerged Rakes: Fully open between cycles.
-
Compact Bottom Blinding Area: Only 56 mm horizontal blind zone.
-
Minimal Side Clearance: Only 2× bar spacing + 1 bar thickness — no extra space for submerged chains.
-
Water Depth Range: Operates reliably from 100 mm to 10,000 mm.
-
Simple Two-Piece Installation: Lower bar assembly grouted in; top unit mounted separately.
-
Self-Cleaning — No Spray Water Required: No service water or cleaning pipes needed.
-
No Wall Support Required: Partition walls can stop at liquid level — top frame is self-supporting.
Technical Specifications
Range/Options
350 mm to 2700 mm
3 mm to 50 mm
Up to 27 meters
100 mm to 10,000 mm
0.75 kW to 2.2 kW
Adjustable via PLC-based local control panel
Inertia-based (no scraper required)
PLC-based, Local/Remote, SCADA compatible
SS304/304L/316/316L/Duplex standard
Parameters
Channel Width
Bar Spacing
Screen Depth
Water Depth
Motor Power
Cleaning Frequency
Debris Discharge
Control Panel
Material Options
Applications
-
Sewage Treatment Plants
-
Pumping Stations
-
Industrial Wastewater Units
-
Stormwater Inlets
-
Urban Canal Interception Chambers
-
Raw Water Intake Jackwells
-
High-Corrosion Environments
Frequently Asked Questions
-
Q1: Why use only one rake?
A: The high-speed single rake matches or exceeds multi-rake performance with fewer moving parts. -
Q2: What happens if the screen jams?
A: The low torque system ensures no structural damage during jamming. -
Q3: How does the screen clean better?
A: The spring-loaded rake applies downward force for deep scrubbing; bucket comb improves debris retention. -
Q4: Is a scraper required?
A: No — inertia-based discharge eliminates the need for fragile scrapers. -
Q5: Can it be retrofitted into existing channels?
A: Yes — easily retrofitted into straight-wall screen chambers. -
Q6: Does it improve flow characteristics?
A: Yes — especially in new installations. Retrofitted chambers see some improvement too.
-
Q7: How simple is the installation?
A: Two-piece installation allows light lifting tools and minimal civil intervention.
-
Q8: Is service water needed?
A: No — the screen is fully self-cleaning. -
Q9: Does it require wall support?
A: No — only light top framing is needed; walls can be terminated at the liquid level. -
Q10: Is it field-proven and covered under warranty?
A: Yes — installations across India, with up to 10 years warranty on fabricated components.
Dip and Draw vs. Other Mechanical Screens
(Multirake, Cable-Raked, Step, Traveling Band, Rotary)
Feature
Raking Speed
Submerged Moving Parts
Scraper Requirement
Debris Capture
Torque in Jamming
Bottom Blinding Area
Side Clearance
Service Water
Wall Support
Warranty & Track Record
Dip and Draw Screen
High (Frequent Single Rake)
None
None
Bucket-backed rake retains debris
Low (Safe)
56 mm
Minimal (2× bar spacing + 1 bar)
Not Required
Not Required
Field Proven, 10-Year Warranty
Most Conventional Screens
Low (Multiple Rakes)
Chains, Tracks, Rakes
Often Required
Rake-only; debris can roll off
High (Can Damage Frame)
Often Larger
+100–150 mm per side
Typically Required
Required
1–2 Years Typical
Closing Note
With numerous successful installations and a performance history across a wide range of site conditions, the Dip and Draw Mechanical Bar Screen brings together mechanical simplicity, hydraulic efficiency, and engineering integrity.
Whether you're planning a new installation or upgrading an existing chamber, this screen offers a field-tested, low-maintenance alternative to conventional systems — with fewer assumptions and greater lifecycle value.
Images and videos of the screen in operation are available on request to help you evaluate real-world performance in environments similar to your own.
Product Video 1
Composite video of screen in action
Product Video 2
Screen Demo at IFAT India, Mumbai
Product Video 3
Commisioning of PS Screen
