BURKERT 329285 (Type 5282) is a servo-assisted 2/2-way diaphragm solenoid valve designed for the reliable control, shut-off, and metering of neutral media. A minimum differential pressure is required for the valve to function. This specific model features a standard brass body that satisfies European drinking water requirements, an NPT 1/2 internal thread connection, and NBR seals suitable for temperatures from 0 °C to +80 °C. The 3/2-way pilot valve can be easily converted from Normally Closed (NC) to Normally Open (NO) circuit function by rotating it on the armature. The solenoid coils are moulded with a chemically resistant epoxy, and the valve is equipped with a service-friendly manual override for start-up and testing.

Key Features

• Servo-assisted diaphragm valve: Suitable for up to DN 65 orifice.
• Separating diaphragm: Ideal for aggressive and contaminated media.
• Adjustable switching times: Closing and opening times can be adjusted individually via side throttle screws.
• Manual override: Service-friendly manual actuation for easy commissioning.
• Convertible circuit function: Easily switch between NC and NO by rotating the pilot valve.

General Technical Data

Property	Value
Orifice	DN 13 (1/2 inch)
Circuit function	A - Normally closed (NC)
Body material	Brass according to DIN EN 50930-6
Seal material	NBR (Nitrile rubber)
Coil material	Epoxy (Thermal insulation class H)
Operating voltage	120 V / 60 Hz
Duty cycle	100% continuous operation
Operating medium	Neutral gases and liquids (e.g., compressed air, water, hydraulic oil)
Medium temperature	0 °C to +80 °C
Ambient temperature	Max. +55 °C
Degree of protection	IP65 (with correctly connected cable plug)

Circuit Functions

The Type 5282 valve can be configured for different circuit functions. The delivery condition for model 329285 is Circuit Function A (Normally Closed).

• Circuit function A (CF A): 2/2-way solenoid valve, servo-controlled, normally closed.
• Circuit function B (CF B): 2/2-way solenoid valve, servo-controlled, normally open.

Changing Valve Function

The 3/2-way pilot valve can be converted from NC to NO circuit function by turning the pilot valve through 180°. Note: The circuit function can only be changed for variants up to 10 bar.

Approvals and Conformities

• North America (USA/Canada): UL Listed (UL 429) and CSA approved.
• Explosion Protection: Optional ATEX/IECEx variants available (Category 2, Zone 1/21).
• Drinking Water: Suitable for use in drinking water applications (materials comply with UBA assessment principles).
• DNV GL Classification: Accepted for installation on vessels classed by DNV GL.

Materials

No.	Element	Material
1	Coil	Epoxy
2	O-ring	NBR, EPDM, FKM
3	Cover	Brass (DN 13 stainless steel 1.4408/316)
4	Spring	Stainless steel 1.4310/302
5	Diaphragm	NBR, EPDM, FKM
6	Diaphragm holder	Brass, stainless steel 1.4401/316
7	Valve body	Brass (DN 13 stainless steel CF3M)
8	Manual override	PA

Dimensions

Standard Threaded Variant

Note

Dimensions are in mm. For NPT threads, the dimensions D2 and F2 apply.

Installation and Operation

Safety Instructions

• High Pressure: Before loosening pipes and valves, turn off the pressure and vent the pipes.
• Electrical Shock: Before reaching into the device, switch off the power supply and secure it to prevent reactivation.
• Hot Surfaces: Risk of burns if used for a prolonged switch-on time. Keep the device away from highly flammable substances.

Before Installation: Installation can be in any position, preferably with the actuator upright. Prior to installation, check pipelines for dirt and clean if required. To ensure reliable function, a dirt filter (≤ 500 µm) must be installed in front of the valve inlet.

Manual Emergency Actuation:

Caution

When the manual emergency actuation is locked, the valve can no longer be actuated electrically.

Setting Switching Times: The closing and opening times of the valve can be changed if required using the side throttle screws. Be cautious with liquid media and short closing times, as they can cause higher pressure surges, potentially reducing the service life of the diaphragm.