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ISO 9001 & ISO 14001 Audit Reports | Connexion Developments
View Connexion Developments Ltd ISO 9001 and ISO 14001 audit reports, certification results and environmental and quality management performance.
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Read MoreCan a Solenoid Valve Handle Reverse Flow and Back Pressure? | Solenoid Valve World
Can a solenoid valve handle reverse flow or back pressure? Learn why flow direction matters, how pilot-operated valves react and how to specify correctly.
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Read MoreZero-Rated & Assisted-Lift Solenoid Valves Explained | Solenoid Valve World
Zero-rated and assisted-lift solenoid valves work from 0 bar differential. Learn when you need one for gravity-fed, pump-off and low-pressure applications.
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Read MoreSolenoid Valves for Hydrogen Gas | Materials & Selection Guide
How to specify solenoid valves for hydrogen gas: embrittlement-resistant bodies, permeation-rated seals, ATEX IIC certification and fail-safe selection.
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Read MoreCryogenic Solenoid Valves -196°C | High Pressure 400 Bar
Cryogenic solenoid valves for media temperatures to -196°C and pressures up to 400 bar. Stainless steel, NC & NO, 1/8" to 2" BSP options.
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Read MoreSolenoid Valves for Chilled Water & Glycol Cooling Systems
How to specify solenoid valves for chilled water and glycol cooling loops: seal materials, body choice, condensation and IP rating, sizing and freeze protection.
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Read MoreGas Interlock Solenoid Valves for Commercial Kitchens | Buyer Guide
How to choose a gas interlock safety shut-off solenoid valve for a UK commercial kitchen: BS 6173, EN 161, manual vs auto reset, sizing and voltage.
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Read MoreDN12 Proportional Control Valve 200 Bar | 4-20mA
DN12 motorised proportional control valve for -1 to 200 bar. 4-20mA or 0-10V control, Kv 30 L/min, 1/2" port, PTFE seal and failsafe option.
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Read MoreSolenoid Valves for Diesel, Fuel Oil & Heating Oil | Selection Guide
How to choose a solenoid valve for diesel, fuel oil and heating oil: seal materials, body, normally closed fail-safe, direct-acting sizing and filtration.
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Read MoreAC Solenoid Coil Inrush vs Holding Current | Sizing Guide
AC solenoid coil inrush vs holding current explained: why coils draw a high pull-in surge and how to size power supplies, PLC outputs, fuses and transformers.
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Read MoreChoosing a Solenoid Valve for Vacuum Service | Solenoid Valve World
How to select a solenoid valve for vacuum duty: why direct-acting zero-rated valves win, correct flow direction, sealing, seal materials and duty cycle tips.
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Read MoreFlanged vs Threaded Solenoid Valves: How to Choose the Right Connection
Flanged or threaded solenoid valve? Compare BSP screwed and flanged connections on size, pressure, sealing, maintenance and cost to specify the right fit.
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Read MoreHow to Test a Solenoid Valve with a Multimeter | Solenoid Valve World
How to test a solenoid valve with a multimeter: check supply voltage, coil resistance and continuity, plus mechanical checks to decide coil or valve swap.
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Read MoreManual Override on Solenoid Valves: What It Is and When to Specify One
Manual override on solenoid valves explained: momentary vs maintained types, direct-acting vs pilot-operated behaviour, ATEX safety and how to specify one.
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Read MoreSolenoid Valves for Hot Water and Heating Systems | Solenoid Valve World
How to choose a solenoid valve for hot water and heating systems: seal materials, body choice, servo vs direct-acting, glycol, temperature limits and WRAS.
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Read MoreDiaphragm vs Piston Solenoid Valves | Solenoid Valve World
Diaphragm vs piston solenoid valves compared: how each seals, temperature and pressure limits, dirt tolerance and which to choose for water, air, steam or oil.