BURKERT 389542 (Type 6014) is a direct-acting 3/2-way plunger solenoid valve engineered in a compact Banjo configuration for direct mounting onto pneumatic process valves and actuators. Featuring circuit function C (normally closed), this complete valve unit integrates a 1.5 mm orifice (DN 1.5) controlling neutral gases and liquids across an operating pressure range of 0 to 16 bar. It is powered by a 24 V AC (50 Hz) coil rated at 8 W power consumption and features a vibration-proof, bolted coil assembly along with an emergency manual override for commissioning and maintenance operations.

The core assembly incorporates a stainless steel stopper welded directly to the core guide tube, a design structure developed to enhance pressure resistance and eliminate leak paths. Media-contacting elements are constructed from polyphenylene sulphide (PPS) and brass, combined with fluorocarbon rubber (FKM) seat and external seals, providing operational reliability across fluid temperatures ranging from -10 °C to +100 °C (up to +120 °C with epoxy encapsulation) and ambient conditions from -10 °C to +55 °C.

Operating Principle and Circuit Function

Type 6014 operates via direct mechanical coupling between the solenoid armature and the valve seat without requiring minimum differential pilot pressure. In the de-energized resting state of Circuit Function C, the internal spring holds the plunger against the inlet seat, keeping pressure port 1 (P/NC) closed while connecting working port 2 (A/OUT) to exhaust port 3 (R/NO). Upon electrical energization with 24 V AC, the magnetic core pulls the plunger upward, unseating port 1 to establish flow through to working port 2 while closing exhaust port 3.

Circuit Function C Definition

• Switching State: 3/2-way valve, direct-acting, normally closed in de-energized position.
• Fluid Ports: Port 1 (P) inlet, Port 2 (A) working outlet to actuator, Port 3 (R) exhaust vent.
• Flow Capacity: Flow rate $Q_{\text{Nn}}$ of 75 l/min (air) and $K_v$ value of 0.054 m³/h (water).

Banjo Design for Pneumatic Valve Automation

BURKERT 389542 utilizes the Banjo BJ02 mechanical interface, specifically configured to thread directly into the pilot air port of pneumatic quarter-turn actuators, linear control valves, and cylinder drives. The hollow banjo bolt acts simultaneously as working port A and structural fastener, reducing piping length, intermediate fittings, and installation labor.

• Direct Actuator Mounting: Working port A (G 1/4 hollow banjo bolt) threads directly into actuator ports, allowing the valve body to swivel 360° prior to final torquing.
• Vibration Resistance: The coil housing is secured mechanically with a heavy-duty nut to prevent loosening in high-vibration compressor or plant environments.
• Emergency Manual Override: Allows manual actuation during installation, power outages, or loop testing without energizing the coil.

Materials of Construction

Item	Component	Material Specification
1	Retaining Nut	Thick-film passivated steel (brass version) / Stainless steel 1.4305 / 303 PTFE-coated
2	Solenoid Coil	Polyamide (PA) / Epoxy (high temperature optional)
3	Stopper	Stainless steel 1.4105 / 430F
4	Shading Ring	Copper (Cu)
5	Core Guide Tube	Stainless steel 1.4303 / 305 / 308 (welded assembly)
6	Magnetic Core / Armature	Stainless steel 1.4105 / 430F
7	Return Spring	Stainless steel 1.4310 / 301
8	Sub-base Plate	Thick-film passivated steel
9	Plunger Seal	FKM (Fluorocarbon rubber)
10	O-Ring	FKM (Fluorocarbon rubber)
11	Valve Body	PPS (Polyphenylene sulphide)
12	Pressure Connection P	G 1/4 female thread
13	Fastening Screws	Brass / Stainless steel 1.4301 / 304
14	External O-Rings	FKM (Fluorocarbon rubber)
15	Pressure Connection A	G 1/4 male banjo bolt (brass)
16	Exhaust Connection R	Integrated exhaust channel

Technical Performance and Operating Limits

Parameter	Value / Range
Orifice Size (Main Valve Orifice 1 P)	1.5 mm (1/16")
Pressure Range (Gas and Liquid)	0.00 bar to 16.00 bar
Air Flow Rate ($Q_{\text{Nn}}$ air)	75 l/min
Water Flow Coefficient ($K_v$)	0.054 m³/h (standard orifice rating 0.07 m³/h)
Nominal Operating Voltage	24 V AC (50 Hz), voltage tolerance ±10%
Electrical Power Rating	8 W
AC Inrush Power	24 VA
AC Holding Power	8 VA (8 W)
Valve Switching Time (Opening)	10 ms to 15 ms (pressure rise 0 to 90% at 6 bar, +20 °C)
Valve Switching Time (Closing)	15 ms to 20 ms (pressure drop 100 to 10% at 6 bar, +20 °C)
Fluid Viscosity Limit	Maximum 21 mm²/s
Permissible Fluid Media	Compressed air, neutral gases, technical vacuum, water, hydraulic oils, petrol
Fluid Temperature Range	-10 °C to +100 °C (PA coil) / -10 °C to +120 °C (epoxy coil)
Ambient Temperature Range	-10 °C to +55 °C
Coil Insulation Class	Class B (polyamide) / Class H (epoxy)
Duty Cycle	100% ED continuous rating

Operating Pressure and Coil Limits

• Do not exceed 16 bar operating pressure in Circuit Function C.
• When operating on non-standard circuit functions, refer to manufacturer derating tables (e.g., maximum pressure in function D is 2 bar for DN 1.5).
• Ensure supply voltage matches 24 V AC 50 Hz ±10%; overvoltage may cause coil overheating.

Dimensional Specifications

Type 6014 Banjo variant BJ02 is supplied with a 76 mm hollow banjo bolt. Dimensions for the valve body and coil size 5 assembly are detailed below:

Banjo Variant Code	Working Port A (Hollow Bolt)	Pressure Port P (Body Port)	Thread Depth G (mm)
BJ02 (Article 389542)	G 1/4	G 1/4	10
BJ01	G 1/8	G 1/8	10
BJ03	G 1/8	NPT 1/4	10
BJ04	G 1/4	NPT 1/4	10
BJ05	G 1/8	G 1/4	10
BJ07	G 1/8	NPT 1/8	10

Coil Size	Width Dimension E (mm)	Length Dimension F (mm)
Coil Size 5	32	45
Coil Size 6	40	51

Installation and Electrical Connection

Type 6014 Banjo valves can be mounted in any orientation, though installing with the solenoid coil upright is recommended to minimize particulate deposition within the core guide tube.

Installation Guidelines

• Clean connecting pipework thoroughly prior to assembly to prevent debris from reaching the valve seat.
• Fit the hollow banjo bolt with its corresponding FKM O-rings into port A of the pneumatic actuator. Position the valve body to the desired orientation, then tighten the hollow bolt to specification.
• Use the emergency manual override for diagnostic checks only. Ensure it is returned to automatic operating position before powering the circuit.

Electrical Connection Interface

The valve features terminal blades matching DIN EN 175301-803 Form A. The electrical cable plug is not included in the standard delivery package and must be ordered separately:

• Cable Plug Type 2518: Standard Form A industrial plug. Available without wiring (0–250 V AC/DC, Article 314802), with LED indicator (12–24 V AC/DC, Article 314812), or with LED plus varistor surge suppressor (12–24 V AC/DC, Article 314820).
• Cable Plug Type 2509: Heavy-duty Form A plug without circuitry (0–250 V AC/DC, Article 137943), certified for UL 429 and ATEX Category 3 GD combinations.

Ordering Chart and Related Banjo Variants

All Banjo models listed below feature Circuit Function C (normally closed), FKM sealing, integrated manual override, and 8 W nominal coil power:

Circuit Function	Variant Code	Pressure Port P	Working Port A (Banjo Bolt)	Orifice DN (mm)	$Q_{\text{Nn}}$ Air (l/min)	Pressure Range (bar)	Banjo Bolt Material	Article No. 024/DC	Article No. 024/50	Article No. 230/50
CF C (3/2 NC)	BJ01	G 1/8	G 1/8	1.5	75	0 to 16	Brass	20098150	389539	389541
CF C (3/2 NC)	BJ01	G 1/8	G 1/8	2.0	120	0 to 10	Brass	20098151	389545	389547
CF C (3/2 NC)	BJ02	G 1/4	G 1/4	1.5	75	0 to 16	Brass	334869	389542	389543
CF C (3/2 NC)	BJ02	G 1/4	G 1/4	2.0	120	0 to 10	Brass	334870	389548	389550
CF C (3/2 NC)	BJ05	G 1/4	G 1/8	1.5	75	0 to 16	Brass	20058931	on request	on request
CF C (3/2 NC)	BJ05	G 1/4	G 1/8	2.0	120	0 to 10	Brass	20034151	on request	on request
CF C (3/2 NC)	BJ06	G 1/8	G 1/4	2.0	120	0 to 10	Brass	on request	20051143	20043155