Solenoid Valve Terminology B


Solenoid Valve Terminology B

Banjo Fitments : Banjo fitting is also known as an internally inserted bolt, consists of is a spherical union hollow fitting with a hollow male bolt through it that can rotate inside the eye. There is a flow path through the both and eyelet for the transfer of fluid or gas. This allows for a flexible pipe to be connected or screwed into a valve or manifold by only rotating the bolt and not the whole fitting. Typically used in small confined spaces.

BAR : Bar is the measure of pressure, 1 bar equals 14.5psi. See pressure

BBL : An abbreviation for "barrel", used to express liquid volume. One barrel of oil is equal to 42 U.S. gallons.

BDV Blow Down Valve : A manually actuated ball valve installed at the end of an extended drain line to vent, release and drain pressure system away and out to atmosphere or drain.

Belleville Spring : A spring similar to a dished shaped washer, used in some ball valves to push the seats against the gate.

Bending Moment : A mechanical bending load or force applied to a part at right angles to its surface or axis. The product of the force times the perpendicular distance to the point of restraint is usually expressed in pound-feet or torque.

BGO - Bevel gear Operated : Valve actuation by means of a set of bevel gears having pinion axis at right angles to a larger ring gear. The gear ratio determines the mechanical multiplication of the torque achieved. i.e. a bevel gear ratio of 4 to 1 will increase the initial torque and turns by the same factor.

Bi-directional : Bi-directional means that the flow of media though the solenoid valve can be in either direction from inlet to outlet or from outlet to inlet. Bi-directional valves are good for maintaining and controlling back pressure such as a coaxial valve or angle seat piston valve.

Bleed Orifice : A bleed orifice is a small hole or flow path most typically found in the side of a flexible elastomer diaphragm or piston assembly of pilot operated or assisted lift solenoid valves, that allows the media entering the valve to pass through and enter above the diaphragm or piston.

Body Material : The body material of a valve refers to the valve main body material of construction for example a solenoid valve with a brass body will have a Brass body, but may have other materials of construction internally or externally.

Bolt : A long externally threaded fastener with a square or hexagonal nut at one end. Used to connect flange connections or valve bonnets (tops) to the valve base.

Bolt Circle : The circle that passes through the centre of all the flange bolt holes.

Bolted Bonnet : A valve bonnet or top body cover that is bolted to or restrained and held in place with bolts.

Bolted Construction : A bolted construction valve or solenoid valve whose valve bonnet and body or pressure shell elements are bolted together. Bolted construction valves can be disassembled and repaired on site.

Bolting Sets : Bolts or threaded studs with nuts used to install a valve between pipe line flanges.

Bonnet : The bonnet of a solenoid valve is the valve top body cover that typically sandwiches the diaphragm between it and the lower valve body, to which the armature assembly and solenoid coil are fitted. The bonnet of other valves will be the same top part of the valve body whish guides the stem and adapts to extensions or operators.

Bore : The inside diameter of the smallest opening for the media passing through the valve. The diameter of the hole in a ball valve will be the diameter of the hole in the ball, the diameter of the bore of a gate valve is the diameter of te opening when the gate is situated. Typically the inside diameter of the valve seat.

BREEAM : BREEAM sets the standard for best practice in sustainable building design, construction and operation and has become one of the used and recognised standards of a buildings environmental performance standards. Breeam motivates design engineers, clients and BMS installers to reduce energy consumption, low carbon foot prints to minimise energy demands before considering energy efficiency and low carbon technologies.

Brinell Hardness Number : A brinell hardness number indicates the metal hardness using the brinell scale. Can be converted to Rockwell B&C hardness scale.

BRV Body Relief Valve : A relief valve installed on ball valves to provide for the relief of excess body pressure caused by thermal expansion.

BSP Thread : BSP is British Standard Pipe thread, which can be BSPP parallel or BSPT tapered thread.

Bubble Tight Solenoid Valve : Is a solenoid valve that when closed will shut and prevent any detectable leakage through the valve. This is typically less than or equal too a measured 0.0001 cc per second of air, which is used for liquids which are much thicker (water is 25 times thicker than air) would be substantially less.

Buried Service : A valve application where the valve is installed below ground level, and could be in a damp or wet environment with potential for flooding.

Burst pressure : The burst pressure of a valve the the extreme pressure required which will cause the valve to leak externally from the one or more pressure containing parts. Typically valve design working pressure is 25% - 33% of the valve burst pressure.

Butt Weld Ends : Butt weld end connections of a valve have been suitably prepared inn readiness for welding into a pipeline.

Butterfly Valve : A short face-to-face valve which has a movable vane, in the centre of the flow stream, which rotates 90 degrees as the butterfly valve opens and closes, much like the old style webber carburettor. By rotation of its disc butterfly valve controls the flow. It may be used for on – off applications as well as flow modulating. Connection types may be wafer, lug, flanged, groove end, threaded and butt welded. For components do not differ for different connection types, valves shown below may be taken as reference for all

  • Concentric butterfly valve : Valve body, stem and obturator are concentric.
  • Double eccentric butterfly valve : First eccentricity is between the valve body, obturator and the second eccentricity is between the stem and operator.
  • Triple eccentric butterfly valve: In addition to the double eccentric type, the third eccentricity is the conical shape of the obturator seating face. Therefore operator only contacts body seating face when closed.

BVR - Ball Valve Regulator : An automatic throttling valve controlling flow or pressure in a pipeline; comprising a package involving a ball valve, actuator, position-er and controlling instrument.

Bypass : A system of pipes and control valves to allow the flow of media to divert around another valve or vessel, so that the valve or vessel can be isolated and then removed or repaired without the need to stop the flow of media.