BURKERT 338139 Type 6281 is a servo-assisted 2/2-way diaphragm valve. A minimum differential pressure is always required for the valve to function. The standard brass body meets European drinking water requirements. To reduce electrical power consumption during operation, coils with integrated Kick-and-Drop (KD) electronics featuring double coil technology are available. The valve features a vibration-resistant, centrally screwed coil system and a damped design for quiet closing.

General Technical Data

Product properties
Seal	NBR, EPDM, FKM
Body	Brass acc. to DIN EN 50930-6, stainless steel
Inner valve parts	Stainless steel, brass, plastic (PPS)
Orifice	DN 10...DN 50
Thermal insulation class	Polyamide coil class B, Epoxy coil class H
Duty cycle	100 % continuous operation
Degree of protection	IP65 in accordance with DIN EN 60529/IEC 60529 with cable plug

Circuit Functions

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

Materials

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

(See datasheet for full dimension tables based on orifice and port connection)

Safety Instructions

Risk of injury from high pressure in the system Before loosening lines or valves, switch off the pressure and vent the lines.

Risk of injury from electric shock Before reaching into the device or the system, switch off the power supply and secure it against reactivation. Observe the applicable accident prevention and safety regulations for electrical devices.