Manufacturer & Exporter of Industrial Valves like, Knife Edge Gate Valves, Automatic Control Valves, Safety Relief Valve, Pilot valves, Pressure Reducing valve, Gas regulator, Jacketed valve,Forged Steel Valves, Ball valve, Butterfly valve, Gate & Globe valve, Check valve, Pulp & Plug Valves, Pinch valve, Diaphragm valve, Flush bottom valve, etc.
Manufacturer & Exporter of Industrial Valves like, Knife Edge Gate Valves, Automatic Control Valves, Safety Relief Valve, Pilot valves, Pressure Reducing valve, Gas regulator, Jacketed valve,Forged Steel Valves, Ball valve, Butterfly valve, Gate & Globe valve, Check valve, Pulp & Plug Valves, Pinch valve, Diaphragm valve, Flush bottom valve, etc. Home About Company Quality of Valves Our Products Range Globally Clients Our Contact

Knife Edge Gate Valve is one of the specific design among other Industrial Valves. This design ensures minimum contact between the parts of the valve, Reduces the Wear & Tear. The high performance Knife Gate Valves feature. Non Sliding Motion, Avoid Sliding Contact between Body & Gate allow flushing of media form the valve interior. Batten edge of the Gate (Knife-Edge) allows the tight shut off even when solid particles settles at the bottom of the Body. A wide variety of hardened trim options are available on Gate, Seat and Wear Ring.

Knife Gate Valve are Generally Unidirectional Valves, Excellent Hopper Isolation Valves with their ability to cut through flowing media and closed by dislodging any material in the seating area.

Knife-Edge Gate Valves withstand high Temperature & Abrasive Slurries in Mining, Steel, Power, Chemical, and Paper Industries Ideal for high-density Slurry Lines.

TYPE :

Uni-directional / Bi-directional Knife Edge Gate Valve

MOC :

Cast Iron / Cast Steel / SS 304 / 316 / 304L / 316L.

Body: Cast Corrosion resistant steel or cast iron to provide receptivity against corrosion For all wetted parts

Gate: The Stainless steel knife gate plate is precision-buffed on both sides, to enhance Packing life and ensure positive shut off even heavy or high-viscous fluid.

Stem: Stainless steel or as desire, having double start thread rising / non-rising spindle, For fast closing and opening.

Seat: Renewable Metal-to-Metal, replaceable type, soft seat and other Suitable to application. In addition to standard stainless steel seat ring, rubber ring and Teflon seat rings are Available as options. Gland Packing: Multi layer gland packing in a variety of materials to suit condition provides total sealing.

Port :

Round Port, “V” Notch

END CONNECTION :

Flanged End / ull Lugged, Wafer Flangeless, Two Lug, Wafer Flangeless, Flange Type, Wafer

SIZES :

50mm T0 800mm (higher size on application)

RATING :

10 bar up to 600mm for valves with body in C.S., S.S. and specially alloy, 10 bar Up to 300mm & 5 bar on higher sizes up to 600mm with body in Cast Iron / Ductile Iron.

Drilling :

Option Include ANSI, DIN, BS, JIS and AS standard; others on request 

OPERATION AVAILABLE :

Knife edge Gate Valves Operation - Manual, Cylinder Operated, Electrical Actuator, Pneumatic Actuator with Manual Override.

WIDELY USED FOR :

Knife edge Gate Valves for Slurry Lines, Sludge and Viscous Media Handling, Pulp and Paper Stock Lines, Dry Solid and Powder Handling, High Temperature Gas Lines and Many More.

Actuator: Hand Wheel, Chain wheel, Bevel Gear hand wheel or chain wheel, Pneumatic Double Acting cylinder and electric actuator.

Accessories: Flow-age Knife Edge Gate Valves also can be supplied with a wide range and variety of manual, pneumatic and electronic accessories as per suitable to service requirement. These all accessories are mostly bought-out from reputed suppliers.

Electro Pneumatically Operated Knife Edge Gate Valve
 

V-Notch Knife Edge Gate Valve
Available in Actuation and Modulating Type
 
20" Knife Edge Gate Valve
Clyinder Operated
 
Electrical Actuator Operated Knife Gate Valve
With Weather Proof Design In Critical Application
With Limit Switch And Manual Over Ride
Bi-Directional 300#
Knife Edge Gate Valve
For High Pressure Application

 

KNIFE EDGE GATE VALVE:

Flow-age Solid cast knife-edge gate valve provides value and performance with many standard features not found in other, commodity knife-edge gate valve. Flow-age Knife edge gate valve is one of the specific design among industrial valves and generally Uni-Directional design with solid cast single wafer, full lugged, two lugs and flanged type body, renewable seat type, rugged stainless steel gate around on both sides for lasting wear resistance, increased packing life and smooth operation. A wide variety of hardened trim options are available on gate & seat ring.

APPLICATION

Flow-age Knife-edge gate valves are widely used in various application such as Thermal Power plants, Mining’s Collieries, Cement Industries of Slurry Lines, Pulp & Paper Industries for Stock Lines, Carbon Black Plants for High temperature gas lines, Dry solid power handling such as polymer chips handling. Sewage and waste water treatment, chemical sledges, sticky media and molasses for sledge and viscous media handling, Steel plant, Sugar Industries, Fly ash, powders, Clean or Corrosive gases.

PNEUMATIC ACUTATORS:

Flow-age Cylinder Actuators provide a versatile method to automate Knife Edge Gate Valve.

As more processes and systems move to automated control and monitoring, the need for actuated knife gate and slide gate valves becomes apparent. Flow-age manufactures an extensive range of pneumatic cylinder actuator for line valve automation requirements. Actuation provides remote, out-of-sight operation, faster cycling, lower operating costs, better processes management and safer operation.

Air and Hydraulic cylinder actuators from Flow-age provide a versatile and cost effective method of automation. This adds up to a greater value for you.

TYPES OF ACTUATOR

Flow-age offers different types of Cylinder Actuator suitable for Knife Gate & Slide Gate Valve. Flow-age Cylinder Actuator is a double acting design and is available in a wide range of cylinder diameter and stroke lengths.

  • Standard cycle duty Air cylinder up to 8 bar rated

  • Specially design for high cycle duty Air cylinder up to 15 psi rated

  • Specialized Heavy duty Hydraulic cylinder up to 210 bar rated

Type: Double Acting

Cylinder Size Range: 65 to 400mm and other respected to service condition

Rating: Suitable for normal operation with Air supply up to 8 bar. Cylinder tube tasted at 20 bar.

NOMENCLATURE:

Cylinder Tube – Aluminium Grey Color Double Powder Coated
Piston – Cast Iron
Piston Seals- Neoprene Rubber
Piston Rod – Steel with Hard Chrome Plated (Others available on request)
Piston Rod Seal - Neoprene Rubber
Top & Bottom end Cap – Cast Iron with Black Color Double Powder Coated
Tie Rods – Steel
Air Connection – Ό” To 1” NPT (F)

ACCESSORIES

Flowage Cylinder actuators also can be supplied with different types of accessories required for specific application and automation requirements (For knife edge gate valves).

MANUAL OVERRIDE

Flow-age also offers a manual hand operation facility with cylinder actuator. Which is a very useful at the time of Air or Electric supply failure.

SOENOID VALVE

Make – Rotex, Festo, Janatics, ASCO Make
Type – 5 x 2 Way
Body – Aluminium, Brass, S.S.
Coil Voltage – 220 V. / 110 V. / 24 V. D.C.
Weather Proof, Ex-Proof, IIA, IIB, IIC
Size – Ό” To 1”

AIR FILTER REGULATOR

Shavo Norgen / Placka Make – Ό” To Ύ” NPT (F)

LIMIT SWITCHES

Design – Mechanical, Proximity Switch
Make – BCH, Honeywell, P & F
Type – SPDT: (01 N/O + 01 N/C)
DPDT: (02 N/O + 02 N/C)
Enclosure – Weather Proof, IIA, IIB, IIC

POSITIONERS

1. Make: Flucon Make

Type: Pneumatic – Pneumatic Type knife edge gate valves
Input: 3 to 15 psig

2. Make – KOSO Make

Type: Electro-Pneumatic Type (I/P Converter in built)
Output: 4 – 20 mA

I/P CONVERTER

Make: Flucon / ABB Make, Weather Proof
Input: 4 – 20 mA
Output: 3 to 15 psig
End Size – Ό” NPT (F)

SPEED CONTROL VALVE

Needle valve to control the speed of actuator operation during open & close
Make – Flow-age
Body – S.S., Aluminium, Brass
Size – Ό” to ½” NPT (F)

PNEUMATIC TUBING & FITTINGS

For Knife Edge Gate Valves
Tubing M.O.C.: Copper, PVC Covered Copper, Stainless Steel
Fittings M.O.C.: Brass, Stainless Steel
Size: Ό” To ½”

COMPANION FLANGES, GASKETS & FASTENRS

MODEL:

KB 63 – Full lugged, Wafer type, Flangeless, cast single body, Uni-Directional Knife Edge Gate Valve
KB 64 – Two Lug, Wafer type, Flangeless, cast single body, Uni-Directional Knife Edge Gate Valve
KB 65 – Flange Type, cast single body, Uni-Directional Knife Edge Gate Valve
KB 66 – Full lugged, Wafer type, Flangeless, cast single body, Bi-Directional Knife Edge Gate Valve
KB 67 – Two Lug, Wafer type, Flangeless, cast single body, Bi-Directional Knife Edge Gate Valve
KB 68 – Flange Type, cast single body, Bi-Directional Knife Edge Gate Valve

Selection Of Body Material

BD 1 – Cast Iron
BD 2 – Ductile Iron
BD 3 – ASTM A 216 GR. WCB (Cast Carbon Steel)
BD 4 – ASTM A 351 GR. CF 8 (SS 304)
BD 5 – ASTM A 351 GR. CF 8M (SS 316)
BD 4L - STM A 351 GR. CF 3 (SS 304L)
BD 5L - ASTM A 351 GR. CF 3M (SS 316L)
BDX – Special Body Material

Selection Of Seat Material

ST 1 – SS 304
ST 2 – SS 316
ST 1L – SS 304L
ST 2L – SS 316L
ST 3 – Nitriding to approx 600-1250 HV1 surface hardness
ST 4 – Stelliting overlay on seat with min 1.0mm thickness and min 40 HRc hardness.
ST: EPR – Replaceable EPDM Rubber, max. temp. up to 1200 cen.
ST :VTN - Replaceable VITON Rubber, max. temp. up to 2320 cen.
ST: TFE - Replaceable P.T.F.E., max. temp. 2100 cen.
STX – Special Seat

Selection Of Gate Material

GT 1 – SS 304
GT 2 – SS 316
GT 1L – SS 304L
GT 2L – SS 316L
GT 3 – Nitriding to approx 600-1250 HV1 surface hardness
GT 4 – Stelliting overlay on Gate Edge with min 1.0mm thickness and min 40 HRc hardness.
GTX – Special Gate

Selection Of Gland Packing Material

GP 1 – P.T.F.E. Impregnated Asbestos yarn suitable for maximum temperature up to 1210 C.
GP 2 – Square Graphited Asbestos yarn, suitable for temperature up to 1210 C And pressure 150 psi
GP 3 – Pure P.T.F.E. suitable up to temperature up to 4500 F and pressure maximum 150 psi
GPX – Special Packing

END STYLE

ES 1 – Full Lugged / Two Lugs wafer style with BSP thread hole is the chest area and Lugs

ES 2 - Full Lugged / Two Lugs wafer style with BSP thread hole is the chest area and Through hole is Lugs

DESIGN & TESTING

MSS SP 81 applies only to bonnet less metal-seated knife gate valves, 2” to 24” size, 150 psi CWP. Sizes above 24” are not covered under this standard. Additionally resilient seated knife gate, slide gate valves are no taken standard MSS SP 81. These products are subject to the individual manufacturer’s internal testing & design standard.

Body – MSS SP-81 requires the valve body (pressure vessel and related structure) to designed for and hydrostatically pressure tested to 1.5 times the rated working pressure

# Valve rated pressure – 150 psi
# Body test pressure – 225 psi

Gate – MSS SP-81 requires the gate to be designed for and hydrostatically pressure tested to 1.1 times the rated working pressure

# Valve rated pressure – 225 psi
# Gate test pressure – 165 psi

Seat - MSS SP 81 has an allowable leakage rate (for metal to metal seated valves) of 40 cc per inch of diameter, per minute at 40 psi pressure. On a 12” valves this would be equal 40 times 12, or 480 cc per minute at 40 psi.

  • Maximum allowable leakage of 0.6 GPM when tested with water at 40 psi applied in the normal flow direction.

  • No visible leakage when tested with water at 40 psi (For Soft seated valves only)

Face To Face – MSS-SP-81 has specified face-to-face dimension and tolerance of each valve size to assure ease of installation for the consumer, regardless of the valve manufacturer. See catalogue for dimension.

 

Our Products List

Knife Edge Gate Valves

Automatic Control Valves

Pneumatic Control Valves

Safety Relief Valve

Pressure Reducing Valve

Pressure Reducing Station

Ball Valves

Butterfly Valves

Globe Valves

Gate Valve

Diaphragm Valve

Pulp Valves

Plug Valves

Flush Bottom Valves

Check Valves (NRV)

Blow Down Valves

Forged Steel Valves

Jacketed Valves

Sight Glass - Flow Indicator

P.T.F.E. / Rubber / P.P. Lined Valves

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