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D-20 Metal Waste Water Air Valve 2in to 8in ARI by Aquestia

D-20 Metal Reduced Bore, Combination Air Valve for Wastewater STST

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Description
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2" to 8" D-20 Reduced Bore, Combination Air Valve for Wastewater

2" to 8" D-20 Reduced Bore, Combination Air Valve for Wastewater Technical Specifications Range: 2" –8"Sealing pressure range: 0.05-16 bar (PN 16) Testing pressure: 1.5 times maximum working pressure Temperature Maximum working temperature: 60° C Maximum intermittent temperature: 90° C Valve coating: Fusion bonded epoxy coating in compliance with standard DIN 30677-2 Upon ordering, please specify: model, size, working pressure, thread / flange standard and type of liquid

Valve Selection Options
Valve connections Flanged ends to meet various requested standard
2", 3” valve connections: flanged or threaded BSPT/NPT
Standard materials welded/cast steel body, optional: stainless steel

Optional add-on Components
One-way, Out-only attachment, allows for air discharge only, prevents air intake
Vacuum Breaker, In-only attachment, allows for air intake only, prevents air discharge
Non-slam discharge-throttling attachment, allows for free air intake, throttles air discharge.
Body Metal Cover Polymeric materials.

D-020 Combination Air Valve for Waste Water ari by aquestia

Description
The D-020 is a reduced bore combination air valve installed on a wastewater transmission system to increase pipeline efficiency and reduce energy requirements by improving the hydraulic operation of the system. A continuous air gap in the valve body separates the wastewater from the sealing mechanism.

Installation
Pump stations for sewage, wastewater & water treatment plant
Wastewater and effluent water transmission lines

Features and Benefits
Conical body & external guide rod/disc arm	maximum air gap/ minimum body length
Continuous air gap	separates the liquid from the sealing mechanism
Float assembly and sealing mechanism linkage	free movement, turbulence will not unseal the sealing mechanism
Funnel-shaped lower body	residue matter falls back into the system pipeline
Rolling Seal Mechanism	leak-free sealing over wide range of pressure differentials
All internal parts - stainless steel 316, polymer, rubber materials	non-corrosive and durable
Screened threaded outlet	compatible for vent pipe connection, prevents insect intrusion
Dynamic design	high capacity air discharge, no premature closure
Ball valve	releases pressure and drains valve prior to maintenance

Technical Specifications

Size Range	2” –8”
Sealing pressure range	0.05-16 bar (PN 16) Testing pressure: 1.5 times maximum working pressure
Temperature	Maximum working temperature: 60° C Maximum intermittent temperature: 90° C
Valve coating	Fusion bonded epoxy coating in compliance with standard DIN 30677-2

Upon ordering, please specify: model, size, working pressure, thread / flange standard and type of liquid

Valve Selection Options

Valve connection

Flanged ends to meet various requested standard

2", 3” valve connection: flanged or threaded BSP/NPT

Standard materials

welded/cast steel body, optional: stainless steel

Optional Add-on Components

One-way, Out-only attachment, allows for air discharge only, prevents air intake Vacuum Breaker, In-only attachment, allows for air intake only, prevents air discharge

Non-Slam discharge-throttling attachment, allows for free air intake, throttles air discharge

Additional Product Configurations

SB Underground Air Valve System ARISENSE Air Valve Monitoring System

Non-Slam Add-on Component Data Table for Variable Orifices

Size	Discharge orifice (mm)	Total NS area (mm2)	NS orifice (mm)	Switching point (bar)	Flow at 0.4 bar (m3/h)
2"-8" all sizes	37.5	12.6	4	Spring loaded normally closed	23

Dimensions and Weight

Size	Dimensions (mm)		Connections	Weight (kg)		Orifice Area (mm2)
	max. A	B	C	Steel	ST ST	A / V	Auto.
2” (50mm) THR	550	644	1½” BSP F	16.5	15.8	804	12
2” (50mm) FL	550	605	1½” BSP F	17.5	17.0	804	12
3” (80mm) THR	550	649	1½” BSP F	16.9	16.4	804	12
3” (80mm) FL	550	605	1½” BSP F	18.5	18.5	804	12
4” (100mm) FL	550	605	1½” BSP F	19.5	19.5	804	12
6” (150mm) FL	550	610	1½” BSP F	21.0	21.0	804	12
8” (200mm) FL	550	610	1½” BSP F	24.0	22.0	804	12

FL - Flanged THR - Threaded

NOTE

The cover assembly with the discharge elbow can be set in four directions. Dimension A in the picture and in the table shows the maximum product width. This width can be reduced by changing the direction.

All product weights and dimensions are approximate, B

due to the differences in flange standards, materials and variable accessories.

The valve installed under the air valve must be fully open to prevent damage or malfunction and ensure performance within the specifications of the air valve.

For complete installation instructions, please refer to the IOM document.