The Amiad SAF X Filters are automatic self-cleaning filters designed for various applications, offering efficient filtration and ease of maintenance. These filters are capable of handling a wide range of flow rates and are available in different models (SAF X 1500, SAF X 3000, SAF X 4500) to suit specific requirements.
Function Description:
The SAF X Series filters are automatic, self-cleaning mechanisms driven by an electric motor. They are designed to work with various types of screens, filtering particles from 10 to 800 microns. The filtration process involves water entering the filter inlet, passing through the coarse screen from outside in, and then through the fine screen from inside out. Filtered water flows through the filter outlet.
A gradual dirt buildup on the inner screens causes an increase in pressure differential across the filter. The self-cleaning process begins when this pressure differential reaches a pre-set value. The coarse screen is designed to protect the cleaning mechanism from large objects. Usually, it does not accumulate large quantities of suspended solids and therefore is not cleaned automatically.
The self-cleaning process is initiated either by a pressure differential across the fine screen reaching a pre-set value or by a preset timed interval. The exhaust valve opens, creating high velocity suction force at the scanner's nozzles, which "vacuums" the filter cake from the screen's surface. A 2-way (red/blue) drive unit, connected to the scanner by a threaded shaft, rotates the scanner and provides the spiral path movement. The exhaust valve is activated for the duration of the cleaning cycle by a 3-way solenoid. During the 20-second self-cleaning process, filtered water continues to flow downstream.
The cleaning cycle stages include:
- Exhaust valve opens to atmosphere.
- A 2-second delay.
- Motor starts rotating the suction scanner outward (CCW) until it reaches the outer limit switch (TLS).
- Motor stops and the exhaust valve closes.
- The filter is ready for the next flushing cycle.
- In the next flush cycle, the motor will rotate the scanner inward (CW) until it reaches the inner limit switch (BLS).
Important Technical Specifications:
The SAF X filters come in three main models: SAF X 1500, SAF X 3000, and SAF X 4500, each with varying capacities and specifications.
SAF X 1500:
- Maximum flow rate: 80 m³/hr (352 gpm)
- Design Pressure: 10 bar(g) (150 psi)
- Min. Operating pressure: 2.0 bar(g) (30 psi)
- Temperature Min / Max: 4° / 50°C (39.2° / 122°F)
- Filtration area: 1500 cm² (233 in²)
- Inlet/Outlet diameter: 50, 65, 100 mm (2", 2.5", 4")
- Filter housing: 250 mm (10")
- Weight (empty / operating): 80 mm = 114/174 Kg, 100 mm = 118/178 Kg (2" = 251/383 lb, 3" = 253/385 lb, 4" = 260/392 lb)
- Flushing valve: 50 mm (2")
- Flushing cycle time: 20 seconds
- Reject volume per cycle: 10 liter (2.64 gallon)
- Minimum flow for flushing: 7 m³/h (31 gpm)
- Control voltage: 120 & 24 VAC or 24VDC
- Electric motor: 1/4 HP (0.18 kW) 50/60 Hz
- Rated operation Voltage: 3 phase 208/230/380/400/415/460/575 Volt 50/60 Hz, Single phase, 120/240 Volt 50/60 Hz
- Current consumption: 0.6 Amp. (see electrical diagram for specific values)
- Construction Materials: Epoxy-coated carbon steel 37-2 (Filter Housing and Lid), Stainless Steel 316 (Screens), Stainless Steel 316, POM, PVC (Cleaning mechanism), Epoxy-coated cast iron, Natural Rubber (Exhaust valve), Synthetic Rubber (Seals), Aluminum, Brass, Stainless Steel, PVC (Control).
SAF X 3000:
- Maximum flow rate: 160 m³/hr (700 gpm)
- Design Pressure: 10 bar(g) (150 psi)
- Min. Operating pressure: 2.0 bar(g) (30 psi)
- Temperature Min / Max: 4° / 50°C (39.2° / 122°F)
- Filtration area: 3000 cm² (465 in²)
- Inlet/Outlet diameter: 80,100,150 mm (3", 4", 6")
- Filter housing: 250 mm (10")
- Weight (empty / operating): 80 mm = 119/188 Kg, 100 mm = 123/193 Kg, 150 mm = 126/196 Kg (3" = 260/414 lb, 4" = 269/425 lb, 6" = 277/431 lb)
- Flushing valve: 50 mm (2")
- Flushing cycle time: 20 seconds
- Reject volume per cycle: 20 liter (5.28 gallon)
- Minimum flow for flushing: 14 m³/h (62 gpm)
- Control voltage: 120 & 24 VAC or 24VDC
- Electric motor: 1/4 HP (0.18 kW) 50/60 Hz
- Rated operation Voltage: 3 phase 208/230/380/400/415/460/575 Volt 50/60 Hz, Single phase, 120/240 Volt 50/60 Hz
- Current consumption: 0.6 Amp. (see electrical diagram for specific values)
- Construction Materials: Same as SAF X 1500.
SAF X 4500:
- Maximum flow rate: 240 m³/hr (1,060 gpm)
- Design Pressure: 10 bar(g) (150 psi)
- Min. Operating pressure: 2.0 bar(g) (30 psi)
- Temperature Min / Max: 4° / 50°C (39.2° / 122°F)
- Filtration area: 4500 cm² (700 in²)
- Inlet/Outlet diameter: 100,150,200 mm (4", 6", 8")
- Filter housing: 250 mm (10")
- Weight (empty / operating): 100 mm = 137/204 Kg, 150 mm = 142/231 Kg, 200 mm = 151/240 Kg (4" = 301/449 lb, 6" = 313/508 lb, 8" = 332/528 lb)
- Flushing valve: 50 mm (2")
- Flushing cycle time: 20 seconds
- Reject volume per cycle: 30 gallon (117 liter)
- Minimum flow for flushing: 21 m³/h (93 gpm)
- Control voltage: 120 & 24 VAC or 24VDC
- Electric motor: 1/4 HP (0.18 kW) 50/60 Hz
- Rated operation Voltage: 3 phase 208/230/380/400/415/460/575 Volt 50/60 Hz, Single phase, 120/240 Volt 50/60 Hz
- Current consumption: 0.6 Amp. (see electrical diagram for specific values)
- Construction Materials: Same as SAF X 1500.
Usage Features:
- General Safety Instructions: Operators must be trained, follow safety regulations, and wear appropriate PPE. Proper installation, operation, and maintenance are crucial for safety and performance.
- Installation: Filters must be installed according to detailed instructions, ensuring proper clearance, stable platforms, and secure connections. All bolts must be tightened to recommended torque.
- Pneumatics: A lockable main cut-off switch and a pressure release mechanism are required. Compressed air supply must be clean and dry, and pressure must not exceed 10 bar.
- Hydraulics: Extra safety devices like a Water Cut-Off Valve are recommended for hot water applications. Pressure release/drainage valves are necessary to ensure residual pressure is relieved before maintenance.
- Civil Engineering: Filter installation requires qualified technicians, proper lifting equipment, and adherence to local standards and regulations.
- Commissioning: Follow a step-by-step commissioning process to verify proper installation, wiring, and functionality of the filter and its components. This includes checking power and control wiring, verifying flush valve operation, and confirming scanner movement.
- Filter Operation Modes:
- Filtering mode: Normal function, DP value below set point. Flushing is not active.
- Continuous flushing mode: Flushing process continues regardless of DP. Flushing valve remains open.
- Malfunction mode: Self-cleaning operation stopped, flushing may continue but DP is climbing. A fault light on the control board indicates a malfunction.
- Initiation of Self-Cleaning: Can be initiated by pressure differential or a time interval.
- Suction Nozzle Types: SAF-X filters are available with both suction nozzle types: SLN (Super Loaded Nozzle) for maximum suction/cleaning forces, and STD (Standard) for fine filtration.
Maintenance Features:
- Routine Inspection: Initiate flush cycle by closing the 1/4" valve at the low-pressure sensing port of the pressure differential switch for 5 seconds. Verify that the exhaust valve opens, the scanner moves properly, and the exhaust valve closes.
- Weekly or Bi-weekly Maintenance: Inspect the filter, check for grease on drive shaft, and check for any leakage from the scanner shaft.
- Annual Maintenance: A thorough overhaul is recommended every year or when the filter has completed 50,000 flush cycles. This includes filter disassembly, visual inspection, replacement of seals and O-rings, and re-assembly.
- Screen Cleaning (Clean-Out-of-Place): Screens should be washed with high pressure washer, rinsed from outside-in, and checked for clogged surfaces. Mineral scaling can be removed with acid (sulfuric acid or hydrochloric acid), and organic/biofilm removal with sodium hypochlorite or calcium chlorite.
- Dismantling and Assembling the Filter Components: Detailed instructions are provided for disassembling and reassembling the filter, including steps for removing the suction scanner, drive unit, and various components. Lubrication of seals and moving parts is emphasized.
- Restarting the Filter: After maintenance, double check and re-tighten lid bolts, clean working area, connect power, initiate dry flush cycles, open isolation outlet valve, and bring filter to normal service conditions.
- Winterization Procedure: For installations exposed to freezing conditions, the filter should be put out of operation, drained, and protected from freezing. This includes closing isolation valves, disconnecting power, draining instrumentation, removing shafts, and wrapping the drive unit assembly.
- Troubleshooting: A comprehensive table outlines possible malfunctions, their causes, and corrective actions, covering issues like high DP, motor overload, limit switch fault, and motor time out.
The Amiad SAF X Filters are designed for robust performance, ease of operation, and straightforward maintenance, making them suitable for demanding water filtration applications.
Need help?
General
To Next Page
