Knife Edge Gate Valves

Flosteer Single Cast, Rugged, Heavy Duty body provides corrosion and abrasion resistance on the toughest liquid slurry and dry material handling application. Flosteer High Performance Uni-Directional / Bi-Directional Knife Edge Gate Valve provide better value and performance with many standard features not found in other, commodity Knife Edge Gate Valve. Flosteer Knife Edge Gate Valves are available in different combination of Body, Seat & Gate material. 

Machine ground ultra thick gate and lapped integral / renewable seat are designed to handle dense mixture of stock, and slurries. 

A wide variety of hardened trim options are available on gate, seat ring and deflection cone to perform in critical services. Flosteer Knife Edge Gate Valves are full port design for greater flow capacity and minimal pressure drop.

Body Type Uni-Directional / Bi-Directional
Port Full Round Port / V Notch / Square Port
Stem Rising Stem / Non Rising Stem
Design Standard MSS SP 81
Testing Standard MSS SP 81
Size Range 2 To 32 (Higher Size on Request)
End Connection Full Lugs, Wafer Type, Flangeless 
Two Lugs Wafer Type, Flangeless
Flange Type, Wafer
Rating 150 psi up to 12 Size in C.S./S.S./Alloy Steel Construction and 75 psi up to 24 Size. Size Above 24 is not covered in MSS SP 81 Standard. Contact factory for higher size.
Drilling As Per ANSI B 16.5 / BS / DIN / JIS / IS Standard, Others on request
Operation Manual Hand Wheel / Chain Wheel / Bevel Gear / Pneumatic Cylinder (Double / Single Acting) / Hydraulic Cylinder / Electric Actuator Operated.

Body:
Solid, Rugged, Heavy Duty, One-Piece body casting including flanges. Flosteer Knife Edge Gate Valve design ensures minimum contact between the internal trim parts of valve, Reduce wear & Tear.

Knife Gate:
  • Thicker knife gate to eliminate distortion under maximum differential pressure and to provide tight seating.
  • Precision machined and buffed gate provide long life of seating components and cuts even heavy or high-viscous fluids.
  • Precision finish gate sealing face is lapped to provide the best possible seat tightness.

Stem:
All valves are provided with a Corrosion Resistance, Stainless Steel stem that assures easy, smooth, long life operation and dependable services. Knife Edge Gate Valve also can supply with stem cover on request for additional protection against dust while the valve is in the open condition.

Seat:
Integral / Renewable both types of seats are available with Flosteer Knife Edge Gate Valve. For highly abrasive applications we can supply a replaceable seat ring with a hard faced knife surface. Replaceable Seat extends the service life of the valve. Resilient seats can be easily replaced after removing valve from the line without complete dismantling.

Type: A Metal to Metal Seat [Integral Seat] 
High Temperature
High Density
Positive Shut Off

 

Type: B Metal to Metal Seat [Renewable Seat]
High Temperature
High Density
Positive Shut Off
Abrasive Application
Easy Seat Replaceable Design without
  Dismantling the Valve

 

Type: C Elastomer Rubber Seat [Renewable Seat] 
Temperature Limitation According to Seat 
  Material Selected.
Easy Seat Replaceable Design without
  Dismantling the Valve
No Visible Leakage when Tested with Water
  (Bubble Tight)
Easy Seat Replaceable Design without
  Dismantling the Valve

 

Type: D P.T.F.E. Seat [Renewable Seat] 
Temperature Limitation According to Seat 
  Material Selected.
Easy Seat Replaceable Design without
  Dismantling the Valve
No Visible Leakage when Tested with Water
  (Bubble Tight)
Easy Seat Replaceable Design without
  Dismantling the Valve

 

Type: E Deflector Cone
Deflect the media away from any internal 
exposed parts of the valves such as Knife Gate, Seat etc. To prolong valve life in particularly demanding services, deflection cones are available in different material to suit application.

 

Gland Packing:
Smooth fully machined packing chamber, cast gland follower, multiple packing and true leveling provide uniform compression of packing and it gives zero leakage from gland portion. Different varieties of packing materials to suit condition provide total sealing.

Locking Arrangement:
Flosteer Knife Edge Gate Valves are available in all size of hand wheel operated valves with locking arrangement.

Application:
Knife Edge Gate Valves are widely used in Pulp & Paper Mill, Thermal Power Plant, Sewage & Water Treatment Plant, Sugar Mill, Chemicals Sledges, Sticky Media and molasses for sledge and viscous media handling, Carbon Black Plant, Cement Plants, Steel Plant, Fly Ash, Gases, Powders etc.

Actuators (Operation):
  • Manual Hand Wheel - MA1
  • Chain Wheel - MA2
  • Hand Levers - MA3
  • Bevel Gears - MA 4
  • Pneumatic Cylinder Double Acting - PN1
  • Pneumatic Cylinder Single Acting - PN2
  • Hydraulic Cylinder - HC1
  • Electrical Motor - EM1

Pneumatic Cylinder Actuators:
ON-OFF Cylinder Actuators:
Flosteer Pneumatic Cylinder Actuators are available with Double Acting / Single Acting and Hydraulic Cylinder with Double Acting for on/off or positioning services. Flosteer manufacturing an extensive range of pneumatic and hydraulic cylinder actuator for the line valve automation requirements. 

Depending on the application and service condition, Flosteer can supply suitable bore size diameter cylinder actuators. Flosteer cylinder actuators cylinder tube tested at 20 bar and suitable for normal operation with Air Supply up to 8 bar.

Positioning Cylinder Actuators:
Flosteer Pneumatic Cylinder Actuators are also available with Pneumatic or Electro-Pneumatic Valve positioners for throttling control. Positioners are enclosed and mount on the bonnet.

Cylinder Nomenclature:
Cylinder Tube : Aluminium, Inside Grind Honing,
Outer French Blue Epoxy Painting
Piston : C.I. To IS 210 GR. FG 200
Piston Seal : Neoprene (Double Sealing)
Piston Rod : Steel with Hard Chrome Plated 
(Others available on request)
Piston Rod Seals : Neoprene (Double Sealing)
Top & Bottom End Cap : C.I. To IS 210 GR. FG 200 
With Black Epoxy Coated
* Tie Rod : Steel with Zinc Plated
* Spring : IS 4454 GR. II (Spring Steel)
[For Single Acting Act.]
* Air Connection Size: To 1 (Depends upon Cylinder Bore Size)

Accessories:
A variety of accessories are offered as standard, including hand wheel extensions, floor stand and a variety of cylinder actuator accessories for customizing the valve/actuator package to meet specific application requirements.

Positioners:
Flosteer Pneumatic Cylinder Actuators are also available with Pneumatic or Electro-Pneumatic Valve positioners for throttling control. Positioners are enclosed and mount on the bonnet.
Make V-Automat / KOSO / Flucon
Type Pneumatic / Electro-Pneumatic Type

I/P Converter:
I/P Converter are available with Pneumatic cylinder actuator operated Knife Edge Gate Valve to convert 4 to 20 mA input signal to 3 to 15 psig output.
Make ABB / Flucon
Input Signal 4 to 20 mA
Output Signal 3 to 15 psig
End Connection (NPT) Female

Air Filter Regulators:
Pneumatic Cylinder Actuator operated Knife Edge Gate Valves are also available with Air Filter Regulator to provide clean, accurate air pressure to actuators and valve positioners.
Make Placka / Shavo / Festo / Janatics
Size to 1 (Depends upon SV Connection Size)

Solenoid Valve:
Flosteer Pneumatic Cylinder Operated Knife Edge Gate Valves are available with Solenoid Valve to supply air in to Cylinder Actuator.
Make Rotex / Festo / ASCO / Janatics / Mercury / Schrader
Type 5 x 2 Way for Double Acting / 3 x 2 Way for Single Acting
SV Body Aluminium Anodized / S.S. / Brass
Coil Voltage 220 V. / 110 V. / 24 V. AC / DC
Enclosure Weather Proof / Explosion Proof / IIA / IIB / IIC
Size To (Depends upon Cylinder Connection Size)

Position Indicating Switch:
Position Indicating Switches (Limit Switch) are available for use cylinder actuators to know the on-off condition of valve in Control Room.
Design - Mechanical / Proximity
Make BCH / Honeywell/P & F/Jayshree
Type - SPDT (01 NO + 01 NC)
DPDT (02 NO + 02 NC)
Enclosure Weather Proof / Explosion Proof / IIA / IIB / IIC
Cable Entry

Speed Control Valve:
Speed Control valves are available with Knife Edge Gate Valve for controlling valve opening or closing speed with pneumatic cylinder actuators.
Make Flosteer
Body S.S. 304 / 316
Size To (NPT) Female

Pneumatic Tubing & Fitting:
To Connect With Cylinder & Solenoid / Positioner
Tubing Copper / PU Coated With Copper / S.S. 304 / 316
Fittings Brass / Brass With Chrome Plated / S.S. 304 / 316
Size To [Depends Upon Cylinder & Solenoid / Positioner Connection Size]

Companion Matching Flanges, Gasket & Fasteners:
As per required materials and specification.

Electrical Motor Actuator:
Flosteer Knife Edge Gate Valves can be furnished with Electrical Actuator operated. Actuator Make Rotork, Auma, ACT, Antrieb etc.

When doing enquiry or ordering for electrical actuator operated Knife Edge Gate Valves, please specify the shut off pressure, service condition flow media, max./min./normal temperature, installation direction, type of application on/off or throttling (controlling), speed of operation, electrical characteristics voltage and phase, actuator accessories and controls as per specification requirements.

Valve Design & Testing: As Per MSS SP 81
Body Test:
Flosteer Knife Edge Gate Valves are tested at 150 psi up to 12 Size in C.S./S.S./Alloy Steel Construction and 75 psi up to 24 Size. 

Seat Test:
MSS SP 81 has an allowable leakage rate (for metal to metal seated valves only) of 40 cc per inch of diameter, per minute at 40 psi pressure. On a 12 size valves this would be equal 40 times 12, or 480 cc 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.
  • For Soft Seated (Elastomers/P.T.F.E.) valves no visible leakage when tested with water at 40 psi.

Above 24 Size & Renewable seat design Knife Edge Gate Valves is not covered in MSS SP 81 Standard. Contact factory for higher size with application.

Ordering:
To order Flosteer Knife Edge Gate Valve, simply complete the order code from information shown.

Valve Body Style:
Give Valve Body Style Code as follows:

MPU1 Two Lugs, Wafer Type, Flangeless, Cast Single Body, Uni-Directional Design Knife Edge Gate Valve.

MPU2 Full Lugs, Wafer Type, Flangeless, Cast Single Body, Uni-Directional Design Knife Edge Gate Valve.

MPU3 Flange Type, Cast Single Body, Uni-Directional Design Knife Edge Gate Valve.

MPB1 Two Lugs, Wafer Type, Flangeless, Cast Single Body, Bi-Directional Design Knife Edge Gate Valve.

MPB2 Full Lugs, Wafer Type, Flangeless, Cast Single Body, Bi-Directional Design Knife Edge Gate Valve.

MPB3 Flange Type, Cast Single Body, Bi-Directional Design Knife Edge Gate Valve.

Valve Size:
Give Valve Size Code as follows:
1 = 2 [50mm]
2 = 21/2 [65mm]
3 = 3 [80mm]
4 = 4 [100mm]
5 = 5 [125mm]
6 = 6 [150mm]
8 = 8 [200mm]
10 = 10 [250mm]
12 = 12 [300mm]
14 = 14 [350mm]
16 = 16 [400mm]
18 = 18 [450mm]
20 = 20 [500mm]
24 = 24 [600mm]

End Connection Style:
Give End Connection Code as follows:
EC Two Lugs / Full Lugs, Wafer Style with BSP Threaded hole in chest area and lugs.
ED Two Lugs / Full Lugs, Wafer Style with BSP Threaded hole in chest area and through hole in Lugs.

Body Material:
Give Body Material Code as follows:
B1 = IS 210 GR. FG 200 [Cast Iron]
B2 = Ductile Iron [S.G. Iron]
B3 = ASTM A 216 GR. WCB [Cast Carbon Steel]
B4 = ASTM A 351 GR. CF 8 [S.S. 304]
B5 = ASTM A 351 GR. CF 8M [S.S. 316]
B6 = ASTM A 351 GR. CF 3 [S.S. 304L]
B7 = ASTM A 351 GR. CF 3M [S.S. 316L]
B8 = Alloy 20
B9 = Hast Alloy C
BX = Any Other Special Body Material

Gate Material:
Give Gate Material Code as follows:
G1 = Stainless Steel 304
G2 = Stainless Steel 316
G3 = Stainless Steel 304L
G4 = Stainless Steel 316L
G5 = Alloy 20
G1 = Hast Alloy C
G6 = Nitriding to approx 600-1250 HV1 surface hardness
G7 = Stelliting overlay on Gate Edge with min. 1.0mm thickness and min. 40 HRC hardness
GX = Any Other Special Gate Material

Seat Material:
Give Seat Material Code as follows:
SM1 Stainless Steel 304 [Metal To Metal]
SM2 Stainless Steel 316 [Metal To Metal]
SM3 Stainless Steel 304L [Metal To Metal]
SM4 Stainless Steel 316L [Metal To Metal]
SE1 EPDM Rubber [Renewable Type Soft Seat]
SE2 Neoprene Rubber [Renewable Type Soft Seat]
SE3 Viton Rubber [Renewable Type Soft Seat]
SP1 P.T.F.E. [Renewable Type Soft Seat]
SS1 - Nitriding to approx 600-1250 HV1 surface hardness
SS2 - Stelliting overlay on seat with min. 1.0mm thickness and min. 40 HRC hardness
SS3 - Alloy 20
SS4 - Hast Alloy C
SSX - Any Other Special Seat Material

Gland Packing Material:
Give Packing Material Code as follows:
SGM Standard General Service Packing Material
SGP P.T.F.E. Impregnated Asbestos, suitable up to temperature maximum 2100 C.
HTM High Temperature Graphite Asbestos Packing Material
PPT Pure P.T.F.E. Packing Materials, suitable up to temperature maximum 2300 C.
FPM Food Grade Packing Material

Port:
RP = Round Port
VP = V Notch Port
SP = Square Port
PX = Any Other Special

Stem:
RS = Rising Stem Type
NR = Non-Rising Stem Type

Actuator (Operation):
Give Actuator Code As above mentioned

Ordering Example:
MPU2,6,ED,B3,G2,SM2,SGM,RP,RS,MA1

 

 

 

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