Danfoss actuator (003H6844) — genuine PN 25 spare assembly for the Danfoss self-acting controller range. It is the diaphragm actuator / setting-spring "top works" that mounts on the controller valve body: the actuator senses the controlled differential pressure through the Ø6 mm copper impulse tubes and modulates the valve cone, and the adjustment part carries the setting spring that fixes the working range. Fits Danfoss AVA, AVD controllers, bypass / return / flow (per controller configuration). Adjustable setting range 1 – 5 bar. OEM designation "Actuator PN25 1-4,5 AVA, AVD byp/ret/flo". Net weight 3.083 kg. Contains lead per the REACH candidate list. OEM P/N 003H6844. Technical data quoted verbatim from store.danfoss.com (code 003H6844). Used in commercial refrigeration, provision-room cooling and reefer plant rooms across HFC, HFO and CO2 (R744) refrigerants.
| Code number | 003H6844 |
| Type | Actuators and adjustment parts |
| Item | Actuator |
| Product group | Accessories — SAC (self-acting controllers) |
| Function | Diaphragm actuator / setting-spring assembly for self-acting controllers (top works) |
| For product type | AVA, AVD |
| Mounting version | Bypass / return / flow (per controller configuration) |
| Pressure class | PN 25 |
| Pressure setting range | 1 – 5 bar |
| Differential-pressure setting range | 1 – 4.5 bar |
| Impulse-tube connection | Ø6 mm copper (compression fittings) |
| OEM description | Actuator PN25 1-4,5 AVA, AVD byp/ret/flo |
| REACH Candidate List substance | Lead (CAS no. 7439-92-1) |
| Volume | 9.95 L |
| Net weight | 3.083 kg |
| Gross weight | 3.083 kg |
| EAN | 5702421552995 |
| HS code | 8481.90 |
| Description | Actuator PN25 1-4,5 AVA, AVD byp/ret/flo |
| Differential pressure setting [bar] [Max] | 4.5 bar |
| Differential pressure setting [bar] [Min] | 1 bar |
| Pressure setting range [bar] [Max] | 5 bar |
| Pressure setting range [bar] [Min] | 1 bar |
| REACH Candidate List substances | Lead (CAS no. 7439-92-1) |
| Pressure rating | PN 25 |
| MOQ | 1 |
Genuine Danfoss actuator/adjustment-part spare (003H6844) for the AVA, AVD self-acting controller family, bypass / return / flow (per controller configuration). Match the controller type, mounting version and setting range (1 – 5 bar) to the valve body on site before ordering — the actuator top works and the valve body are ordered separately. Connects to the controlled/impulse pressure via Ø6 mm copper impulse tubes (compression fittings). Pressure class PN 25.