Piston, Angle, Needle, Diaphragm Valves

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Piston, Angle, Needle, Diaphragm Valves

JGV Piston Valves

A PISTON VALVE is a device used to control the motion of a fluid, air or steam along a tube or pipe by means of the linear motion of a piston within a chamber or cylinder. Piston Valves are typically constructed primarily from pipe fittings and machined plastics or metals. The inside of a piston valve contains a piston that blocks the output when the valve is pressurized, and a volume of air behind the piston. When the pressure behind the piston is released the piston is pushed back by the force of the pressure from the input. This allows the valve to be opened by a much smaller pilot valve, with speeds faster than possible with just a manually operated valve.

Piston Valves also control the admission of steam into the cylinders and its subsequent exhausting, enabling a locomotive to move under its own power. The valve consists of two piston heads on a common spindle moving inside a steam chest, which is essentially a mini-cylinder located either above or below the main cylinders of the locomotive.

Features :

  • Manufacturing Standard:BS 1873/ASME B16.34
  • End Flanged & Drilled as per ASME B16.5.R.F
  • Face To Face AS Per ASME B16.10
  • Teasted AS Per: API
  • Available With Actuator Operation On Requirement
  • Available In Class 150, 300
  • Availabe In Variuos CS & SS Material
  • Avalibale With IBR Cerificate

Piston Valve Range & Specification

From Forge & Cast

Size : 15 mm (1/2″) – 300 mm (12″)
Body & Type : Regulatory, Glandless & Fire Safe
Operation : Hand Wheel, Gear, Actuator (Pneumatic & Electrical)
Design Standard : BS 1873, EN 12516-2, ASME B 16.34, Face To Face ASME B16.10
Pressure Rating : 150 #, 300 # , 600 #, 800#, 1500#
Testing Standard : BS EN 12266-1 (BS-6755-PART-1), API 598
End Connection : Butt-Weld, Flanged, Socket-Weld, Screwed BSP or NPT
Material Of Construction : Standard – A 105, F304L, F316L, WCB, CF8, CF8M, CF3, CF3M
On Request – CN7M, CF8C, Duplex Gr. 4A, Super Duplex Gr.5A / 6A , Nickel Alloy, Monel, Hastelloy, Inconel, SS 904L etc.
Trim : SS 410, SS304, SS316, SS 304L, SS 316L, Monel

JGV Angel Valves

An ANGLE VALVE is a manually operated valve with its outlet opening oriented at right angles to its inlet opening, used for regulating the flow of a fluid in a pipe. A Valve for controlling the flow of a liquid or air, the fluid leaves at right angles to the direction in which it enters the valve, i.e. 90°  of configuration of inlet and outlet ports.

Features :

  • Manufacturing Standard:BS 1873/ASME B16.34
  • End Flanged & Drilled as per ASME B16.5.R.F
  • Face To Face AS Per ASME B16.10
  • Teasted AS Per: API
  • Available With Actuator Operation On Requirement
  • Available In Class 150, 300
  • Availabe In Variuos CS & SS Material
  • Avalibale With IBR Cerificate

Angel Valve Range & Specification

From Forge & Cast

Size : 50 mm (2″) – 300 mm (12″)
Body & Type : 90 Deg Angled, Holes Tapped
Operation : Hand Wheel, Gear
Design Standard : BS 1873, ASME B 16.34, Face To Face MSS SP-81, Flanged ASME B 16.50
Pressure Rating : 150 #, 300 # , 600 #
Testing Standard : BS EN 12266-1 (BS-6755-PART-1)
End Connection : Butt-Weld, Flanged RF Serrated
Material Of Construction : Standard – WCB, CF8, CF8M, CF3, CF3M
On Request – CN7M, CF8C, Duplex Gr. 4A, Super Duplex Gr.5A / 6A , Nickel   Alloy, Monel, Hastelloy, Inconel, SS 904L etc.
Trim : SS 410, SS 304, SS 316, SS 304L, SS 316L, Monel

JGV Needle Valves

NEEDLE VALVE is a type of valve with a small port and a threaded, needle-shaped plunger. It allows precise regulation of flow, although it is generally only capable of relatively low flow rates. n instrument needle valve uses a tapered pin to gradually open a space for fine control of flow. The flow can be controlled and regulated with the use of a spindle. A needle valve has a relatively small orifice with a long, tapered seat, and a needle-shaped plunger on the end of a screw, which exactly fits the seat.

As the screw is turned and the plunger retracted, flow between the seat and the plunger is possible; however, until the plunger is completely retracted, the fluid flow is significantly impeded. Since it takes many turns of the fine-threaded screw to retract the plunger, precise regulation of the flow rate is easily possible.

Needle Valve Range & Specification

Bar Stock Needle Valve :

Size : 15mm (1/2”) to 2” (50mm)
Type : Single Piece
Operation : Hand Lever
Design Standard : ASME B16.34 / BS 5352
Testing Standard : BS EN 17292-1
Pressure Rating : 2000 PSI, 3000 PSI, 4000 PSI, 6000 PSI
End Connection : Screwed (NPT or BSP), Socket Weld.
Material Of Construction : SS304, SS316, A105
Trim : SS304, SS316, SS410

JGV Diaphragm Valves

DIAPHRAGM VALVES or (Membrane Valves) consists of a valve body with two or more ports, an elastomeric diaphragm, and a “weir or saddle” or seat upon which the diaphragm closes the valve. There are two main categories of diaphragm valves: one type seals over a “weir” (saddle) and the other (sometimes called a “full bore or straight-through” valve) seals over a seat. In general, straight-through diaphragm valves are used in on-off applications and weir-type diaphragm valves are used for control or throttling applications. While diaphragm valves usually come in two-port forms (2/2-way diaphragm valve), they can also come with three ports (3/2-way diaphragm valves also called T-valves) and more (so called block-valves). When more than three ports are included, they generally require more than one diaphragm seat; however, special dual actuators can handle more ports with one membrane.

Features :

  • Design Standard BS 5156
  • Teasted As Per BS:5156
  • Face To Face AS Per ASME,B16.10 Class-125
  • End Connection:Flanged end to BS:10 Table D Socelt Weld ASME B16.11 Screwd end to ASME B1.20.1
  • Ebonite Lined,Neoprene Lined, Teflon Lined, Butyle Lined “A” Type(Wear type) “KB” type (Full Opeaning) Pressure Rating PN 10

Diaphragm Valve Range & Specification

From Forge & Cast

Size : 50 mm (2″) – 200 mm (8″)
Body & Type : Weir & Straight Type, Body Lining on request, Seat Material -Natural Rubber, EPDM, Nitrile, Neoprene, Butyl, Hypalon, Viton, PTFE
Operation : Hand Wheel, Gear, Actuator (Pneumatic & Electrical), Rising Hand Wheel
Design Standard : BS 5156, Face To Face Dimensions ASME B 16.10 1873, ASME B 16.34, Face To Face MSS SP-81, Flanged ASME B 16.50
Pressure Rating : PN 10, PN 16
Testing Standard : BS 5146, BS EN 12266-1 (BS-6755-PART-1)
End Connection : Flanged, Screwed BSP or NPT
Material Of Construction : Standard – WCB, CF8, CF8M, Cast Iron
Trim : SS 410, SS304, SS316, SS 304L, SS 316L

General Applications:

PISTON VALVE :

The PISTON VALVE is a simple device that has become an industry standard valve for controlling high temperature steam and water.
  • These valves used in pneumatic cannons, stationary steam engines and steam locomotives.
  • In saturated and superheated steam and hot water service in power plants, refineries, pulp and paper mills, etc. as steam headers and manifolds, condensate manifolds, de-super-heaters, steam trap isolation, etc
  • Piston valves are also capable of handling gases such as oxygen, nitrogen, and hydrogen. They are used as well with heat transfer oils and various chemicals.
  • Another application of piston valves is as tank and reactor drain valves, where the piston is referred to as a ram.
  • Piston valves can tolerate debris in the lines, minimizing any corrosion on the sealing surfaces due to flowing fluid.

ANGLE VALVE :

ANGLE VALVES regulate flow, control flow, and reduce pressure. They can also influence temperature and regulate material levels. ANGLE VALVES are used in many settings from the toilet in your home to a ship in a sea. They ensure safe processing of a variety of liquids, chemicals and gases serving Petrochemical, Shipbuilding, Aerospace or Compressed Gas Industry

NEEDLE VALVE:

NEEDLE VALVES can be used in many different applications with a need for flow or pressure regulation, control and discharge of fluid, liquid, air, gas etc.,. Used in Water Treatment and Distribution, Dams & Reservoirs Inlets, Power Plants and Industry, Pump Start, Turbine By-pass etc.,

DIAPHRAGM VALVE :

DIAPHRAGM VALVES can be used as on-off and throttling service valves. They offer good chemical resistance. Stem leakage is eliminated and provides bubble-tight service. Does not have pockets to trap solids, slurries and other impurities and is suitable for slurries, viscous fluids, hazardous chemicals and radioactive fluids. These valves do not permit contamination of flow medium. As such mainly used as follows:
  • Clean or Dirty Water and Air Service Applications, such as De-mineralized Water Systems
  • Corrosive Applications
  • Radio-waste Systems in Nuclear Facilities
  • Vacuum Service
  • Food Processing, Pharmaceutical and Brewing Systems