CONCENTRIC SPLIT DIAPHRAGM (CSD) VALVE ALSO CALLED IRIS VALVE
ELECTRIC OR PNEUMATIC ACTUATION WITH POSITIONER
Flow Control Applications:
- Sugar Industry: Sugar Syrups, Molasses, Massecuites, Lime (Caoh) Slurry, Etc.
- Pharma And Chemical: Slurries, Multiple Kinds Of Viscous Fluids, And Free-Flowing Materials Or Powders Or Granules
- Wastewater Treatment Plants: Wastewater From Municipalities And Industries, Air Flow Regulation For Aeration Control Application
- Pulp And Paper Industry: Paper Pulp And Fluids With Fibrous Suspensions
- Free-Flowing Granules Or Pellets: Salt, Powders, Grain, Polymer Granules With A Particle Size Between 0.5Mm And 10Mm
- Air And Gas: Industrial Hot And Cold Air, Non-Corrosive Gases
Flow Profile Of Concentric Split Diaphragm Valve:
Gravity Discharge Installation:
Inline Installation: The Flow Profile Through The Split Diaphragm’S Center, Minimizes Pressure Drop, Noise, And Flow Turbulence Throughout The Entire Flow Regulation Range
Other Applications:
- Controlled Gravity Flow Of Grains Or Pellets Or Powders With A Particle Size Between 0.5 Mm And 10 Mm
- Ideal For Controlling Gravity Flow Control Of Flow Of Slurries / Semi-Solids / Concrete And Other Fluids
- Ideal For Ratio Control Of Two Or More Ingredients Falling In A Vessel
- Hot And Cold Airflow Control
Characteristics And Advantages Of IRIS OR CSD Valve:
- Rugged build quality for long life and frequent throtteling and on / off Operations.
- Heavy-duty rugged valve construction absorbs all shocks and vibrations.
- Valve internals designed to operate under heavy media loads.
- Precise flow control without hysteresis due to the concentric opening of the Split diaphragm.
- Energy saving whilst flow control due to free passage through concentric Opening.
- Low noise and no flow turbulence throughout the full flow control range.
- Very Low Maintenance.
- High Flow Capacity
- Lower Pressure Loss Than Other Valve Types Due To Free Passage Through Concentric Opening.
Valve controller with the following features:
- Pid control action for flow control
- Remote set variable facility for flow control as per another process Parameter
- Built-in auto-manual station
- Dcs input facility (4-20ma dcs control output for valve control given Through toggel switch. This avoids need of additional junction box on field)
- Toggle switch for switching between dcs output and local controller Output
- Optional valve position feedback as 4-20ma
Pneumatic Actuation:
- Pneumatic Clylinder With Electro-Pneumatic Positioner For Smooth Linear
- Control Action
- Operating Air Pressure: 2 - 7 Kg/Cm2
- Input: 4-20Ma From Any External Source
Electric Motorized Actuation:
- Electric Actuator Geared Ac Induction Motor
- Operating Voltage: Single Phase 110 Vac 60Hz / 230 Vac 50 Hz Or Three Phase 440 Vac 50 / 60Hz
- Input: 4-20Ma From Any External Source Or Push Buttons
Hand Wheel:
- Geared Hand-Wheel
Hand Lever:
- Hand Level Operated
IRIS or CSD Valve Specifications:
| Valve Type | : | IRIS Or Concentric Spilt Diaphragm Valve |
| Sizes | : | 2" (50mm), 3" (75mm), 4" (100mm), 6" ( 150mm), 8" (200mm), 10" (250mm), 12" (300mm), 16" (400mm), 18" (450mm) |
| Body Material | : | Standard: Ms Fabricated On Request: SS 316L / SS 304 / LCB |
| Petal Segments | : | Standard: Ss 304. On Request: Ss 316L, Duplex Steel 2205 / Other Special Material |
| Bearings And Wedges Material | : | Standard: Ss 304. On Request: Ss 316L, Duplex Steel 2205 / Other Special Material |
| Sheathing | : | PTFE / PU |
| Actuation | : | Pneumatic Linear / Electric - Motorized / Hand - Wheel |
| Actuator Stroke / Torque | : | As Per Valve Size And Line Pressure |
| Positioner | : | Electro-Pneumatic / Electronic |
| Position Feedback : (Optional) | : | 4 - 20 MA / 0 - 5 VDC |
| Input (For Actuated Valves Only) | : | 4 20 Ma From Any External Source Or Push Buttons For Open And Close |
| Media Temperature And Pressure | : | -45 To 160°C, 0-10Kg/cm2 |