Danfoss AFPQ 2 PN 40 self-acting differential-pressure & flow controller actuator — return-mounted, setting 0.2–1 bar, 160 cm² diaphragm, valve DN 65–125 (003G5711)

Danfoss AFPQ 2 PN 40 — a self-acting combined differential-pressure and flow controller. A single rolling-diaphragm actuator both holds the differential pressure across the controlled section constant and limits the maximum flow to a preset value, without external power. This return-mounted (AFPQ 2) variant senses across the consumer and throttles the matching globe valve body to maintain the set differential pressure while capping flow at the adjusted flow-restrictor setting. The actuator carries the diaphragm and setting spring only; it combines with a Danfoss VFG 2 / VFGS 2 / VFU 2 globe valve body (ordered separately) to form a complete self-acting controller for district heating and district cooling circuits. Actuator diaphragm area 160 cm²; differential-pressure setting 0.2–1 bar; suits valve bodies DN 65–125. Media temperature 2 °C to 150 °C; maximum operating pressure 40 bar. Actuator housing Steel, mat. 1.0345, zinc plated; diaphragm EPDM (Rolling, fibre enforced). Medium: district heating/cooling circulation water (glycolic water up to 30%). OEM designation "AFPQ 2, PN 40, 0.2 bar - 1 bar, 160 cm²". OEM P/N 003G5711. Technical data quoted verbatim from store.danfoss.com (code 003G5711). 1.0345, zinc plated; diaphragm EPDM (Rolling, fibre enforced); Standard size: AFPQ 2; Pressure rating: PN 40; Temperature range: 2 °C to 150 °C; HS code: 8481.90. Used in commercial refrigeration, provision-room cooling and reefer plant rooms across HFC, HFO and CO2 (R744) refrigerants. No.

Code number

003G5711

Type

AFPQ 2

Product group

Actuators - Pressure Flow

Gross weight

32.5 Kilogram

Net weight

21.9 Kilogram

Volume

191.52 Liter

Actuator diaphragm material

EPDM (Rolling, fibre enforced)

Actuator size [cm²]

160 cm²

Body material

Steel, mat. No. 1.0345, zinc plated

China RoHS compliance

Out of scope

Contains batteries

No

Diameter [mm] [Max]

125 mm

Diameter [mm] [Min]

65 mm

Differential pressure setting [bar] [Max]

1 bar

Differential pressure setting [bar] [Min]

0.2 bar

EU RoHS compliance

Out of scope

Flow control

No

Flow limitation

No

Flow restrictor diff.pressure - dpb [bar]

0.5 bar

Function

Diff. press. and flow controller

Media pH [Max]

10

Media pH [Min]

7

Media temperature [°C] [Max]

150 °C

Media temperature [°C] [Min]

2 °C

Medium alternative

Glycolic water up to 30%

Mounting version

Return

Operating pressure [bar] [Max]

40 bar

Permissible media

District heating/cooling circulation water

Pressure class

PN 40

Pressure controller

Differential pressure controller

Pressure nominal [bar]

40 bar

Pressure setting range [bar] [Max]

1 bar

Pressure setting range [bar] [Min]

0.2 bar

REACH Candidate List substances

Lead (CAS no. 7439-92-1)

Setting Type

Adjustable

EAN

5715162388433

HS code

8481.90

Nominal diameter

DN65

Size / Series

AFPQ 2

Material

Actuator housing Steel, mat. No. 1.0345, zinc plated; diaphragm EPDM (Rolling, fibre enforced)

Pressure Rating

PN 40

Temperature Range

2 °C to 150 °C

HS Code

8481.90