4" Deringer 30

 
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The 4" Deringer 30 Double Check Detector Assembly prevents non-health hazard pollutants from entering a potable water supply system when backpressure and/or backsiphonage conditions occur. Used primarily on fire sprinkler systems when monitoring of unauthorized water use is required.
    The smallest,
    lightest,
    most economical,
    best performing,
    and only all stainless steel
    backflow preventer. period.
Approvals

Important Note: Install with FLEX Couplings or Flange Adapters Only.
DO NOT use RIDGED Couplings!

MSRP: $1,439.00
Pro Price: $1,199.00

Quantity in Stock:99999876

Product Code: 4030

Choose Your Bypass Options

:
GALLONS
CUBIC FEET

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Specifications Technology Downloads
 
Deringer 30 Title
Deringer 30 Cutaway
The Deringer 30 Double Check Detector Assembly prevents non-health hazard pollutants from entering a potable water supply system when backpressure and/or backsiphonage conditions occur. Used primarily on fire sprinkler systems when monitoring of unauthorized water use is required.

Approvals
  Maximum Working Pressure: 175psi (12.1 bar)  
  Temperature Range: 33° - 140°F (1° - 60°C)  
  End Connections    
  - IPS Groove for Steel Pipe: AWWA C606  
  - Flange Adapters: ANSI B16.1 Class 125  
  Lead Free: 0.25% Maximum by Weight  
Flow Chart Title
The type-II bypass assembly is a new technology to the backflow industry and is used on Backflow Direct's Deringer 30 (DCDA-II).

As more manufacturers begin to utilize this technology it is only a matter of time before it’s widely used and is more commonly seen than the old type-I bypass assembly.

We created this video to provide a clear explanation on how the type-II bypass provides the EXACT same level of protection as a type-I bypass as well as some of the similarities and differences between the two.
Flow Charts Title
3 Flow Chart
Measures & Materials Title
Deringer 30 Scematics
Weight: 53lbs (24kg)
Valve Housing: 304 Stainless Steel   SOV Bearings: Teflon/Bronze   Check Pins: 17-7/18-8 Stainless Steel
Valve Cover: 304 Stainless Steel   Non Wetted Bolts: Grade 8 Zinc Plated   Check Seats: Noryl Polymer
SOV Disks: EPDM/304SS:   Wetted Fasteners: 18-8 Stainless Steel   O-Rings: Buna-N
SOV Shafts: 304 Stainless Steel   Check Disks: Silicone      
Bypass: Lead Free Bronze   Check Springs: 17-7 Stainless Steel      
Engineering Specifications Title
The Deringer 30 Double Check Detector Assembly (DCDA-II) shall utilize two independent Dual Action Check modules and two integral resiliently seated shut-off valves all of which shall be contained within a single rigid valve housing constructed entirely of 304 stainless steel. Both integral shutoff valves shall include pre-wired supervisory tamper switches contained within a weatherproof actuator housing approved for both indoor and outdoor use. Dual Action Check modules shall operate as a “poppet style” check under low flow conditions, operate as a “swing style” check under high flow conditions and utilize replaceable silicone elastomer sealing discs. Assembly test cocks shall be handle-less and operate via a tamper resistant actuator. Assembly shall have a single full access service port and cover with an “inline” replaceable elastomer seal. All bypass assembly components shall be lead free and include a meter registering either gallons or cubic feet, a single check valve and required test cocks. Assembly shall be serviceable without special tools and approved for both horizontal and vertical applications.




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