Danfoss AVPB differential pressure controller & flow limiter, PN 16, DN 20, Δp 0.2–1 bar adjustable, 0.1–4.5 m³/h, external thread G 1 A

Danfoss AVPB (003H6402) — self-acting differential pressure control and flow limiter, PN 16, DN 20, for district heating and central heating systems. The AVPB closes on rising differential pressure or when the set maximum flow is exceeded, holding a stable differential pressure across the controlled circuit so that connected control valves keep their authority. The controller combines a control valve with an adjustable flow restrictor and an actuator with one control diaphragm and handle for differential-pressure setting. Differential-pressure setting 0.2–1.0 bar adjustable; flow rate 0.1–4.5 m³/h. Maximum differential pressure 12 bar, maximum water temperature 140 °C, cavitation factor z ≥ 0.6. Valve body red bronze Rg 5 (CuSn5ZnPb, DIN 1705 W.no. 2.1096.01), control diaphragm EPDM, valve insert/spindle CrNi steel 1.4404. Connection external thread G 1 A (ISO 228/1) via tailpieces (ordered separately). Media: water for district/central heating; glycolic water up to 30% resistant to -30 °C. OEM P/N 003H6402. Technical data quoted verbatim from the Danfoss AVPB/AVPB-F PN 16 data sheet and store.danfoss.com (code 003H6402). 2.1096.01); valve insert/spindle CrNi steel 1.4404; control diaphragm EPDM; Pressure rating: PN 16 (max. differential pressure 12 bar); Temperature range: up to 140 °C (heating water); glycolic water resistant to -30 °C; HS code: 8481.80. Used in commercial refrigeration, provision-room cooling and reefer plant rooms across HFC, HFO and CO2 (R744) refrigerants.

Code number

003H6402

Type

AVPB

Product group

Pressure flow controllers

Description

Self-acting differential pressure control and flow limiter (district heating)

Valve size

DN 20

Pressure class

PN 16

Connection

External thread G 1 A (ISO 228/1), via tailpieces

Flow rate [m³/h]

0.1 - 4.5

Differential pressure setting

0.2 - 1 bar (adjustable, factory range)

Max. differential pressure

12 bar

Max. water temperature

140 °C

Cavitation factor z

≥ 0.6

Mounting version

Return

Permissible media

Water for district/central heating systems; glycolic water (≤30%) resistant to -30 °C

Valve body material

Red bronze Rg 5 (CuSn5ZnPb, DIN 1705 W.no. 2.1096.01)

Valve insert / spindle

CrNi steel 1.4404

Control diaphragm

EPDM

EU RoHS compliance

Yes with exemptions (6(c))

REACH Candidate List substance

Lead (CAS no. 7439-92-1)

EAN

5702421539217

Material

Valve body red bronze Rg 5 (CuSn5ZnPb, DIN 1705 W.no. 2.1096.01); valve insert/spindle CrNi steel 1.4404; control diaphragm EPDM

Pressure Rating

PN 16 (max. differential pressure 12 bar)

Temperature Range

up to 140 °C (heating water); glycolic water resistant to -30 °C

HS Code

8481.80