Energy Combustion

ENERGY COMBUSTION, Ahmedabad importer of all types of BRAHMA make Gas Solenoid Valve, Burner Sequence Controller, Ignition Transformer.

Brahma (Italy) is a leading manufacturer of gas and oil solenoid valves, widely used in industrial burners and HVAC systems. Their valves are typically normally closed (NC) and are categorized by their opening speed and size.

1. Key Brahma Model Series

Brahma models are identified by a series prefix and a numerical value representing the size or flow capacity.

2. Model Coding (Suffixes)

Brahma uses specific letters to define the valve's operation:

• S (Fast Opening): Opens immediately (usually $< 1$s).

• L (Slow Opening): Opens gradually via a hydraulic shock absorber; ideal for avoiding "flame lift-off" during ignition.

• SR (Fast Opening + Flow Adjustment): Allows you to manually limit the maximum gas flow.

• GMO: Indicates a specific coil type/connection (often includes a rectifier for noiseless AC operation).

3. General Technical Specifications

• Media: Natural Gas (Methane), LPG, Town Gas, and Air.

• Operating Pressure: * Standard models: Up to 500 mbar ($0.5$ bar).

  • High-pressure variants: Available up to 1 bar (e.g., specific E6G versions).

• Supply Voltage: $230\text{V}$ AC (Standard), $110\text{V}$ AC, or $24\text{V}$ AC/DC.

• Temperature Range: $-10\text{°C}$ to $+60\text{°C}$.

• Protection Class: IP54 (standard), with IP65 available for specific coil types.

• Body Material: Die-cast Aluminum (EG series) or Brass (E6G series).

• Filtration: Integrated wire-mesh filter on the inlet ($> 1$ mm) to prevent debris from entering the valve seat.

4. Adjustment Features (on "L" and "SR" models)

If you have an adjustable model, you will typically find adjustment screws under the top plastic cap:

1. Flow Regulation: A large screw/nut that moves the internal plunger to limit the maximum opening.

2. Opening Time (Slow Models): A small screw that regulates the hydraulic brake to speed up or slow down the opening ramp. 

3. Initial Fast Stroke: On slow-opening valves, you can set an "initial jump" so the valve pops open slightly for ignition before finishing the slow ramp-up.

The VMR Series is manufactured by Elektrogas (Italy). It is one of the most widely used safety solenoid valves for gas and air in industrial burners, boilers, and furnaces. It is known for being a "Fast Opening" and "Fast Closing" valve.

1. Key Characteristics

• Action: Normally Closed (NC). It opens only when energized and closes immediately (Fail-Safe) when power is cut.

• Operation: Fast Opening (< 1 sec) and Fast Closing (< 1 sec).

• Flow Adjustment: Features a manual flow rate adjustment screw on the top (except for 4”, 5”, 6”, and brass models).

• Service: Rated for 100% ED (Continuous Duty).

2. Detailed Technical Specifications

The VMR series covers a wide range of pressures and pipe sizes to suit different industrial needs.

3. Model Variations

• VMR (Standard): Fast opening, aluminum body, adjustable flow.

• VMR OTN: Brass body versions (usually for $1/4$” to $1/2$” sizes).

• VMR6 / VMR 60: High-pressure versions rated for up to 6 bar (90 PSI).

• VML (Related Series): The Slow Opening version of the VMR (opening time adjustable up to 30s).

• VMM (Double Valve): Two VMR valves combined into one housing for space-saving gas trains.

4. Components & Accessories

• Internal Filter: Includes a 600 µm metal mesh strainer to protect the valve seat (not in brass models).

• Pressure Taps: Standard $1/4$” G pressure gauge connections on both sides of the inlet.

• CPI / PCS Switch: Optional "Closed Position Indicator" or "Proof of Closure" switch can be fitted to the bottom to signal the control system.

• Visual Indicator: A mechanical indicator can be added to the top to show if the valve is open or closed at a glance.

5. Adjustment Instructions

To adjust the gas flow on a VMR valve:

1. Remove the plastic cap from the top of the coil.

2. Loosen the locking nut/dowel with an Allen wrench.

3. Turn the internal screw: Clockwise to decrease flow, Counter-clockwise to increase flow.

4. Re-tighten the locking nut and replace the cap.

The VAS Series is manufactured by Kromschröder (part of the Honeywell Thermal Solutions family). It is a modular, high-performance gas solenoid valve belonging to the valVario family, widely used for safeguarding and controlling gas and air supplies in industrial burners.

1. Key Characteristics

• Design: Modular system. The valve body can be customized with different flanges, pressure switches, and indicators.

• Safety Rating: Class A, Group 2 safety shut-off valve according to EN 161.

• Voltage: 230V AC (standard), 120V AC, or 24V DC.

• Housing: Die-cast aluminum.

2. Model Breakdown (Type Code)

The model name tells you exactly how the valve is configured:

• VAS 1–3: Indicates the body size (Size 1, 2, or 3).

• 10–65: Indicates the nominal diameter (DN) of the connection.

• R or N: R for Rp internal thread; N for NPT internal thread.

• Opening Behavior:

  • /N: Quick Opening (< 1 second).

  • /L: Slow Opening (adjustable up to 10 or 30 seconds).

• Voltage Code: W (230V AC), Q (120V AC), K (24V DC).

• S: Includes a Proof of Closure Switch (PCS) and visual position indicator.

3. Technical Specifications 4. Why Use VAS?

1. Compact Modular Design: You can bolt a pressure switch (DG) directly to the side of the valve body without extra piping.

2. Double Valve Option (VCS): Two VAS valves can be joined to create a VCS Double Solenoid Valve, which is a requirement for many safety codes to provide "block and bleed" functionality.

3. Visual Feedback: Features a blue LED to indicate when the valve is energized and optional mechanical indicators to show the internal seat position.

4. High Duty Cycle: Specifically designed for burners that cycle on and off frequently.

5. Common Sizes 

• VAS 115 (1/2")

• VAS 125 (1")

• VAS 240 (1 1/2")

• VAS 350 (2")

Madas is a leading Italian manufacturer specializing in gas safety and control components. Their gas solenoid valves are widely used in industrial burners, gas trains, and heating systems to provide automatic or manual shut-off for gases like Natural Gas, LPG, and air.

1. Main Types of Madas Solenoid Valves

Madas categorizes their valves primarily by their operation (Automatic vs. Manual Reset) and their resting state (Normally Closed vs. Normally Open).

2. Technical Specifications

Most Madas valves share a common robust build suited for industrial environments.

• Body Material: Die-cast Aluminum (standard) or Brass (small sizes).

• Sizes: DN 15 (1/2) to DN 300 (12").

• Pressure Ratings (Pmax):

  • Low Pressure: Up to 200 mbar or 360 mbar.

  • Medium/High Pressure: Up to 1 bar, 3 bar, or 6 bar versions.

• Voltage Options: 230V AC (Standard), 110V AC, 24V AC, or 24V DC.

• Protection: IP65 (Standard); ATEX-rated versions available for hazardous zones.

• Standards: Comply with EN 161 (Automatic valves) and EN 13611.

3. Key Features & Accessories

• Opening Speed: Available as Fast Opening (instant) or Slow Opening (adjustable, usually denoted by "S" or "Q" in the model name).

• Flow Adjustment: Many models feature a screw on the bottom or top to limit the maximum gas flow.

• Closed Position Indicator (CPI): An optional microswitch that sends a signal to a control panel confirming the valve is physically closed.

• Visual Position Indicator (VPI): A physical red/green indicator showing the status of the valve internal shutter.

4. Common Applications

• Industrial Burners: As part of the "Gas Train" to ensure safe ignition and shut-off.

• Gas Leak Detection: Connected to a gas sensor (e.g., Methane or CO detector) to shut off the main supply during a leak.

• Boiler Rooms: Providing emergency shut-off in commercial heating plants.

Madas (Italy) offers a comprehensive range of gas valves designed for safety, regulation, and filtration in industrial and commercial gas systems.

Below is the complete breakdown of Madas valve models categorized by their specific functions and technical specifications.

1. Solenoid Valves (Electromagnetic Control)

Used for automatic gas shut-off. They come in Normally Closed (NC) or Normally Open (NO) variants.

2. Safety Shut-Off Valves (Slam-Shut)

These are mechanical safety devices that snap shut if the system pressure exceeds (OPSO) or drops below (UPSO) safe limits.

• MVB/1 MAX (OPSO): Automatically shuts the gas flow if the pressure exceeds the set point.

• MVB/1 MIN (UPSO): Shuts the flow if the pressure drops below the set point (e.g., pipe rupture).

• Specifications:

  • Sizes: DN 20 to DN 150 (Threaded or Flanged PN16).

  • Pressure Rating: 1 bar or 6 bar bodies available.

  • Reset: Manual reset only (ensures an operator inspects the system after a trip).

3. Gas Filters (FM & FMC Series)

Designed to protect regulators and solenoid valves from dust and debris.

• Models: FM (Standard) and FMC (Compact).

• Filtration: Standard 50micron (washable synthetic cartridge). 10micron and 20micron available.

• Pressure: Up to 6 bar.

• Features: Often equipped with pressure test points (G 1/4") to check for filter clogging by measuring the pressure drop.

4. Safety Relief Valves (MVS Series)

Releases small amounts of gas to the atmosphere to prevent nuisance tripping of the slam-shut valves during minor pressure spikes.

• MVS/1: Standard relief valve.

• MVSP/1: High-capacity relief valve for larger industrial systems.

• Setting Range: 20 mbar to 1000 mbar (depending on the spring).

• Connections: Usually 3/4" or 1" threaded.

5. Specialized Regulators & Ratios

• AG/RC Series: Air/Gas ratio regulators. They maintain a constant gas-to-air ratio for efficient combustion in burners.

• RG/2MCS: High-capacity industrial regulators with integrated safety valves.

Summary of General Specifications

• Body Material: Die-cast Aluminum (standard) or Brass (small series).

• Gases: Natural Gas, LPG, Propane, and Biogas (specific versions).

• Working Temp: -20°C to +60°C.

• Standards: Built in compliance with PED 2014/68/EU and EN 161. 

The Honeywell VE Series (often categorized under the VE4000 series) consists of Class "A" automatic safety shut-off valves. These are compact, direct-acting valves commonly found in gas burners and heating systems.

1. Model Suffix Breakdown

The letter after "VE" (e.g., VE4025A) defines the valve's operation and adjustment features:

• VE...A: Fast Opening / Fast Closing. Standard On/Off valve with no flow adjustment.

• VE...B: Fast Opening / Fast Closing with Flow Adjustment. Includes a screw on top to manually limit the maximum gas flow.

• VE...C: Slow Opening / Fast Closing. Includes an adjustable hydraulic damper for a soft start (opening time variable up to 30s).

• VE...S: Normally Open (NO). Typically used as relief valves; they close when powered and open when power is lost.

2. Common Models & Sizes

The digits following "VE40" usually indicate the DN (Diameter Nominal) pipe size.

3. Core Specifications

• Voltage: 220–240V AC (Standard), 110V AC, or 24V AC/DC.

• Enclosure Rating: IP54 is standard, but IP65 is available for more demanding environments.

• Response Time: Fast-acting models close in < 1 second.

• Ambient Temperature: -15°C to +60°C.

• Internal Screen: Most models include a fine mesh strainer at the inlet to protect the valve seat from debris.

• Material: Die-cast Aluminum body with NBR seals (Viton seals optional for aggressive gases).

4. Special Features

• CPI Switch Support: Many VE valves have a bottom plug that can be replaced with a Closed Position Indicator switch to signal the control panel that the valve is fully seated.

• Pressure Taps: Usually equipped with two $1/4$" Rp threaded pressure taps on the inlet side for testing and monitoring.

• Field Replaceable Coil: The electromagnetic coil can be swapped without removing the valve body from the gas line.

Safety Check: When replacing a VE series valve, ensure you match the O.S. (Ordering Specification) number found on the nameplate (e.g., VE4025A1210T), as this confirms the exact voltage and pressure rating.