| Brand: | Bermad |
| Category: | Control Valves, 400 Series |
| Size Range: | 40-300mm |
| Connection: | 40-80mm - Female Threaded BSP 80-300mm - Flanged |
| Engineering Data: |
Product Description
The BERMAD Model 430-X 3 Way Pressure Relief/Sustaining Valve is a hydraulically operated, diaphragm-actuated control valve that it sustains minimum preset upstream (back) pressure regardless of fluctuating flow or varying downstream pressure.
Features and Benefits
- 3-Way Hydraulic Actuated Pressure Sustaining Valve
- Controls system fill-up
- Sustains upstream line pressure
- Opens fully upon line pressure rise
- Prioritizes pressure zones
- Advanced Globe Hydro-Efficient Design
- Unobstructed flow path
- Single moving part
- High flow capacity
- Fully Supported & Balanced Diaphragm
- Requires low opening and actuation pressure
- Excellent low-flow regulation performance
- Progressively restrains valve closing
- Prevents diaphragm distortion
- User-Friendly Design
- Easy pressure setting
- Simple in-line inspection and service
Pressure Sustaining Valve
1. BERMAD Model IR-430-XZ protects the pump from overload and cavitation, prevents
main line emptying, and controls system fill-up
2. BERMAD Check Valve Model 70N
Typical Applications
- Downhill Supply Lines Emptying Prevention
- Systems Subject to Varying Supply Pressure
- Energy Saving Irrigation Systems
- Pressure Zone Prioritizing
- Line Fill-Up Control
- Pump Overload and Cavitation Protection
Technical Data
Operation
The Pressure Sustaining Pilot [1] senses Upstream Pressure [P1] and diverts line pressure into the Control Chamber [2] should [P1] drops below the setting. Pressure then accumulates in the control chamber causing the Valve to throttle closed, increasing [P1] to the pilot setting. The pilot releases accumulated pressure into the atmosphere when [P1] rises above the setting, thereby causing the Valve to open. Should line pressure remains above setting - the Valve opens fully. The Manual Selector [3] enables local manual closing
* Sustaining (In-Line) Valve Pilot should be set to the minimum system pressure allowed. The relief (Circulation) Valve Pilot should be set slightly above the system working pressure
Materials
Body and Cover
- Polyester Coated Cast or (DN250 and larger) Ductile Iron
Spring
- Stainless Steel
Diaphragm
- Nylon fabric Reinforced NR with rugged insert
Bolts, Studs and Nuts
- Zinc-Cobalt plated Steel
Control Accessories
- Brass
Tubing and Fittings
- Reinforced Plastic and Brass
Pressure Ratings
- 16 bar
Operating Pressure Range
- 0.5-16 bar
For lower pressure requirements, consult Deeco.
Setting Range
- 1.5-16 bar
Setting ranges vary according to specific pilot springs. Please consult Deeco.
Patterns and Sizes
- Globe:DN80-400
- Angle:DN80-100
End Connections
- 40-80mm - Female Threaded BSP
- 80-400mm - Flanged
Bermad - 430-3W - End Connections
Technical Specifications
For technical specifications (Flow charts, valve characteristics, dimensions, etc.) - Please refer to the Engineering Data:
For Spare Parts & Repair Kits - Please refer to the base model:
Due to the wide range of options available and criteria for correct model selection, pricing and configuration are available on application only.
Please consult with Deeco engineers for more information.
