What it is / purposeA Suntec pump solenoid coil is the electromagnetic coil assembly used in Suntec fuel/oil pump models (AS, AL, AP, AT, A2L series and others) to operate the pump’s internal solenoid (cut-off or blocking) valve. When energized the coil creates a magnetic field that shifts the valve plunger, enabling (or disabling) fuel flow to the nozzle line for safe and rapid on/off control of burner fuel supply.

Typical construction & materials

• Coil body: encapsulated copper winding on a bobbin; often epoxy-filled or potted for vibration resistance.
• Housing / sleeve: stamped steel or plated ferrous sleeve that provides the magnetic circuit and mechanical protection.
• Connector / lead options: available as coil-only sleeves (to be fitted into the valve) or supplied with connector/cable assemblies (often 3-pin, or standard 2- or 3-wire lead options depending on pump family). Many aftermarket suppliers list plugs/cables as optional accessories.

Electrical characteristics (common / standard values)

• Voltages available: 24 VDC, 110–120 VAC, 220–240 VAC (50/60 Hz) — several Suntec coil part numbers and aftermarket replacements cover these common supply voltages.
• Power consumption: typically around ~8 W for the common 220–240 V / 50–60 Hz coil; other voltage variants have comparable wattage ratings chosen to give reliable pull-in force.
• Protection class / ingress: many coils are rated IP54 when used with the correct Suntec connector cable / assembly (offers dust ingress protection and splash resistance).

Mechanical / functional details

• Type: used as the actuator for an inline blocking or cut-off solenoid valve (normally closed or normally open depends on pump model; many Suntec pumps use a normally closed blocking solenoid for cut-off).
• Mounting: slide-fit onto the solenoid valve sleeve/plunger on the pump or fitted as a replacement sleeve; some part numbers are “coil only” while others are supplied with the connector or cable.
• Common part numbers / cross references: examples seen in trade listings include Suntec 3713798 (220–240 V), 3713818 (24 VDC), 3713824 (110–120 VAC) and V504 / 65323767 references — always confirm exact pump model and part number before ordering.

Environmental / operational limits (practical guidance)

• Ambient temperature: many listings show rated operation roughly between −10 °C and +80 °C (check specific part datasheet).
• Duty: designed for frequent energization in burner control cycles; they are not continuous-high-temperature motors — ensure coil venting and correct mounting for long service life.
• Compatibility: coils are model-specific — the same electrical rating may have different mechanical dimensions or connector shapes; use Suntec cross-reference charts or the pump’s technical manual to match coil part number to pump model.