The Burkert 363367 (Type 6281) is a servo-assisted 2/2-way diaphragm valve. A minimum differential pressure is always required for the valve to function. This specific model features a brass body, FKM seal, and operates as a normally open (Circuit Function B) valve. It is designed with a vibration-resistant, centrally screwed coil system and a damped design for quiet closing. The standard brass body meets European drinking water requirements, and the valve is suitable for controlling, shutting off, and dosing neutral media.

General Technical Data

Product properties	Specifications
Seal material	NBR, EPDM, FKM (Model 363367 uses FKM)
Body material	Brass acc. to DIN EN 50930-6, stainless steel
Inner valve parts	Stainless steel, brass, plastic (PPS)
Orifice	DN 10...DN 50 (Model 363367 is 13.00 mm)
Thermal insulation class	Polyamide coil class B, Epoxy coil class H
Duty cycle	100 % continuous operation
Switching time	Opening: 0.1...1.5 s, Closing: 0.2...4 s
Voltage tolerance	±10 %
Degree of protection	IP65 in accordance with DIN EN 60529/IEC 60529 with cable plug
Installation	As required, preferably with actuator upright

Circuit Functions

• 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. (Applies to model 363367)

Material Specifications

No.	Element	Material
1	Coil	Polyamide or epoxy
2	Stopper	Stainless steel 1.4113
3	Shading ring	Cu (brass variant), Ag (stainless steel variant)
4	Magnetic core	Stainless steel 1.4113
5	O-ring	NBR, FKM, EPDM
6	Core seal	NBR, FKM, EPDM
7	Spring	Stainless steel 1.4310
8	O-ring	NBR, FKM, EPDM
9	Diaphragm	NBR, FKM, EPDM
10	Diaphragm holder	PPSGF40, DN 50: brass and stainless steel
11	Valve body	Brass acc. to DIN EN 50930-6 or stainless steel 1.4408 (CF8M)

Dimensions (Standard Threaded Variant)

Note: Dimensions in mm. The dimensions F1 and G1 apply to G thread.

DN	A	B	C	D	E	F1	G1	L	SW
10	83.1	94.1	32	44	22	12	G 1/4	50	22
10	85.1	98.6	32	44	24.5	14	G 1/2	50	27
13	91.1	104.6	42	54.5	27.25	12	G 3/8	58	27
13	93.1	109.1	42	54.5	32.5	14	G 1/2	65	27
20	99.6	115.6	60	74	37	16	G 3/4	80	32
25	106.6	127.1	70	85	46	18	G 1	95	41

Safety and Installation

Basic Safety Instructions

• Danger from high pressure: Before loosening lines and valves, turn off the pressure and vent the lines.
• Danger due to electrical voltage: Before reaching into the device or the system, switch off the power supply and secure it against reactivation.
• Risk of burns/fire: Keep the device away from highly flammable substances and media and do not touch with bare hands if operated continuously.
• Risk of short circuit: Make sure valve seals are properly seated and carefully screw the valve and pipelines together.

Before Installation

• Clean pipelines of any contamination.
• Install a dirt trap upstream of the valve inlet (≤ 500 µm).
• Installation position: any, preferably with actuator on top.
• Do not use the solenoid as a lever arm. Hold the device on the body using an open-end wrench and screw into the pipeline.
• Observe the flow direction: the arrow on the body indicates the flow direction.