Burkert 329281 Type 5282 is a servo-assisted 2/2-way diaphragm valve designed to control, shut off, and meter neutral media. A minimum differential pressure of 0.2 bar is required for the valve to function. The standard brass body satisfies all European drinking water requirements. The 3/2-way pilot valve can be easily converted from NC to NO circuit function by rotating it on the armature. The solenoid coils are moulded with a chemically resistant epoxy. The 5282 is equipped with a service-friendly manual override for start-up and testing.

INFO

Provided the cable plug is connected and installed correctly (e.g., Bürkert Type 2508), the device satisfies protection class IP65 in accordance with DIN EN 60529 / IEC 60529.

General Technical Data

Product Properties	Details
Orifice	DN 25 (1 inch)
Circuit function	A (Normally closed)
Body material	Brass according to DIN EN 50930-6
Seal material	NBR (Nitrile rubber)
Coil material	Epoxy (Class H)
Internal valve parts	Stainless steel, brass
Duty cycle	100% continuous operation
Operating voltage	120 V
Voltage frequency	60 Hz
Voltage tolerance	±10%
Nominal pressure	0.2...10 bar
Medium temperature	0 °C...+ 80 °C
Ambient temperature	Max. + 55 °C
Installation position	As required, preferably with actuator upright

Circuit Function

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

Material Specifications

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

Dimensions

Threaded Variant

Note: Dimensions in mm. The dimensions D2 and F2 apply to NPT thread.

DN	A1	B1	NPT (D2)	NPT (F2)	E1	L1	SW
25	121.5	142.0	NPT 1	16.8	70	115	41

Product Installation

WARNING

Risk of injury from high pressure in the equipment. Before loosening the pipes and valves, turn off the pressure and vent the pipes.

Before Installation:

• Installation can be in any position. Preferably: Actuator upright.
• Prior to installation check pipelines for dirt and, if required, clean.

TIP

Dirt filter: To ensure that the solenoid valve functions reliably, a dirt filter (≤ 500 µm) must be installed in front of the valve inlet.

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

Setting the Switching Times: The closing and opening times of the valve can be changed if required with the side throttle screws.

• If closing times are fairly short, liquid media cause higher pressure surges. These may reduce the service life of the diaphragm and destroy other devices and components in the system.
• Discharge of medium if the throttle screws are unscrewed too far.