Latest news High flow pilot valves

1/4" - 1/2" connections
Poppet construction

High flow engineering valves High flow engineering valves High flow engineering valves
High flow engineering valves High flow engineering valves High flow engineering valves

Based on the principle of a balanced poppet construction, the new ¼" and ½" valves have the same outstanding reliability as the popular ¼" basic flow models and are ideal for demanding applications in the chemical, petrochemical and oil and gas industries
Actuator piloting
The main application of theses valves and solenoids is the actuator piloting in process industry.
Principle:
Operation
In the valve's de-energised position, the spring force pushes the lower poppet seal on the lower seat and provides a tight sealing. Used in a normally closed (NC) configuration, the actuator will exhaust through the upper orifice (1).
De-energised
When energised, the core will be pulled against the spring force and will open the lower orifice and close the upper orifice. The compressed air now flows through pilot valve port number (2) to the actuator.
The small air-gap between the moving core and the fixed plugnut minimises the risk of sticking due to dirt and/or the effects of residual magnetism.
Energised
Features
petrochemical industry
High flow solenoid valve
Oil industry
Reliability
High reliability pilot valves and solenoids avoid spurious trips insuring a real fail-safe even in a 1oo1 configuration.

Functional Safety
TÜV approved logoPilot Valves are TÜV certified according to IEC 61508.
The pilot valves are approved for use up to SIL 4 and AK 7.
Low PFD figures contribute to an economical SIS loop

Full universal construction, 0-10 bar
For standardization, works for on-off and control valves

Optimal relation between flow, power and solenoid size
Compact and low weight

High flow value
Fast actuator/process valve response time

Various flow ranges
A selection of flow and power ratings is available.
The relatively high Kv factors vary from approximately 0.5 up to 1.8 m3/h.

High temperature
DC powered solenoids become weaker at higher ambient temperatures.
Valves and solenoids are suitable for temperatures up to 90°C, while still allowing at least 10% voltage drop.

Low temperature
The balanced poppet construction with carefully selected and thoroughly tested seals results in reliable operation, even down to -40°C.

Power Consumption
The special non sticking seals offer a very low friction.
In combination with the balanced poppet construction this reduces the power consumption.
Various power ratings are available to cover the different flow, temperature and safety requirements
(see table).

ATEX Approval
ATEX explosive atmospheres logo Many different solenoids are available to meet different categories, protection methods and environmental conditions.
Solenoid valves comply with both the ATEX electrical and non-electrical standard for gas and dust.

Protections available:

Stainless steel housing EEX d Encapsulated coil EEx m Stainless steel housing EEX em Encapsulated coil EEx n NEMA solenoid head
EEx d EEx m EEx em EEx n NEMA

NAMUR Interface
The NAMUR interface has become the pad mount standard for the direct installation of pilot valves on pneumatic actuators in particular. Valves with NAMUR interfaces are available in both aluminum and 316 stainless steel body material.

Manual Reset and Manual operator function available

Main characteristics
Pipe size Orifice
Ø (mm)		 Flow Kv
(m3/h)		 Fluid Power rating
DC cold		 Body
materials
Basic flow ¼" 6 0.5 air,
inert gas,
water, oil		 3.6, 5.8, 11.2 brass, aluminium*,
316 stainless steel
High flow ¼" and ½"
 12 1.5 air,
inert gas		 10 brass,
316 stainless steel
* aluminium for NAMUR execution only

Literature
Solenoid valves - direct operated, high flow - balanced poppet - 1/4" and 1/2"