Electric Knife Gate Valve PZ973

Product Overview of Knife Gate Valves

■ Product Overview of Knife Gate Valve Factory

The knife gate valve, also known as the knife闸 valve or knife slurry valve, was introduced to China in the 1980s. It finds application in a wide variety of fields—from coal preparation, gangue removal, and slag discharge in mines and power plants, to urban sewage treatment; from slurry transportation in cement and paper mills to specialized pipelines in the food, sanitary, and pharmaceutical industries. With its ultra-thin design, the knife gate valve boasts advantages such as small size, light weight, minimal flow resistance, no accumulation of residue, ease of installation, and ease of disassembly. These features thoroughly address the shortcomings of conventional gate valves, flat-plate gate valves, ball valves, globe valves, control valves, butterfly valves, and other types of valves—namely, large flow resistance, bulky footprint, tendency to accumulate residue, and difficulties in installation and maintenance. As a result, a large number of general-purpose shut-off valves and regulating gates have been replaced by knife gate valves.

■ Media suitable for knife gate valves

Gold ore powder, tailings, mineral sand, slag, coal slime, sand and gravel, steel slag, pulp, wood pulp, cement slurry, fibers, dust, powders, crystals, chemically treated wastewater, slaughterhouse effluent, municipal sewage, settled oil, asphalt, silo outlets, fruits, grains, beer, beverages, petroleum products, steam, gas transmission, as well as power plant water supply and drainage, and slag disposal.

■ Instructions for Selecting Knife Gate Valves

1. When making a purchase, users must specify the valve’s operating conditions, fluid medium, working pressure, medium temperature, nominal diameter, valve material, and quantity.

2. If the required valves have special requirements, the customer must provide detailed drawings and specify these requirements in the purchase and sale contract. Our company will manufacture the valves according to the customer’s specifications.

3. Unless otherwise specified, the valve actuator brand and model shall be the standard model provided by our company.

■ Knife Gate Valve Parameter Range

Design and manufacturing standards: JB/T 8691-1998

Structural length standard: GB/T 15188.2-94

Flange Connection Standard GB/T 9113.1-2000

Valve body material: Q235 Cast steel ( WCB ) Stainless steel ( CF8, CF8M, CF3M, 310S, 2520)

       Sealing material : Rubber ( NBR, EPDM Tetrafluoro ( VITON.PTFE Polyurethane (PU)

      Stainless steel ( Cr13.304.316L) Cemented carbide ( STL/K20/YG8 ) Engineering ceramics ( AL203 )

Sealing structure: unidirectional sealing, bidirectional sealing

Valve structure: rising stem or non-rising stem, through-bore or double-opening.

Support structures: triangular type, four-column type, steel plate type, concealed plate type, arch bridge type (unique structure)

Connection types: Round flange, flanged (dumbbell-shaped), lug-type (clamp-type)

Nominal diameter: DN50~DN2000 NPS 2 ” ~80 ”( Customizable according to customer needs. DN3000 The following special calibers)

Operating temperature: -40 Celsius ~1000 ℃ (based on the specific temperature range for selection)

Nominal pressure: DN50~600 ( 0.5 MPa, 1.0 MPa, 1.6 MPa, 2.5 MPa, 10K, 150 Lb ) (Hydraulic pressure testing of professional equipment)

      DN700~3000 (0.25 MPa, 0.6 MPa, 1.0 MPa) Dedicated sealed cover water pressure testing

Executing agency: Handwheel ( DN50-DN600 )

Pneumatic actuator ( DN50-DN1000 )

Pneumatic actuator ( DN50-DN600 )

Electric actuator ( DN50-DN2000 )

Hydraulic actuator ( DN50-DN2000 )

Electro-hydraulic actuator ( DN50-DN2000 )

Sprocket and chain ( DN50-DN2000 )

Bevel gear actuator ( DN50-DN2000 )

PZ973W, H, X, F

Electric knife gate valve

Electric Knife Gate Valve

■ Product Overview

   The product’s actuator section features a multi-turn electric actuator, which is used to drive and control the opening and closing of the gate. Operators can remotely control the gate from the control room, perform manual operations on-site, or integrate it with a computer for automated control. It is widely used in drainage systems. , Engineering fields such as heating, power plants, chemical industry, food processing, papermaking, pharmaceuticals, coal mining, and others—meeting the automation requirements of modern industrial and agricultural applications.

   ■ Technology Parameter range

Nominal pressure: 0.6 MPa, 1.0 MPa, 1.6 MPa, 2.5 MPa, 10K, 150 Lb

Nominal diameter: DN50~2000mm NPS 2 ” ~80 ”

Operating temperature: -38 + 1100 ℃ (the specific temperature range depends on the material of the sealing element and the properties of the medium)

Link flange: ANSI B16.5 、 GB/T 9113 、 JB/T 79 、 HG 、 SH 、 JIS 、 DIN 、 NF 、 BS

Main material: C.I、 WCB 、ZG1Cr18Ni9Ti、ZG1Cr18Ni12Mo2Ti、CF8、CF8M、CF3、CF3M、2Cr25Ni20

Sealing types: hard seal, soft seal

Leakage amount : Hard seal: D (Liquid) 0.1XDNmm3/s Soft sealing: A (Zero Leakage)

Accessory: Installation flange

Electric device: 380V (220V) Or 660V Special order required. )，50Hz ( 60Hz Special order required);

          The control line is 220V，50Hz ( 60Hz Special order required); remote control is 24VDC

Protection rating: Standard outdoor type: IP55; Explosion-proof IP67

Explosion-proof rating: Standard outdoor type: None; Flameproof type: dl;dllBt4

   Valve installation is shown in the diagram.

Schematic diagram of required accessories for installation:

1. For blind hole installation, use the matching component: short external hexagonal bolt. *n Hexagon nut *n Flat washer or spring washer *n
2. Through-hole installation using matching components: long external hexagonal bolt *n Hexagon nut *n Flat washer or spring washer *n
3. Metal-wound gasket or rubber gasket *2 Each valve per piece
4. Torque wrench *2

Note: n the number of = For the number of bolt holes and bolt lengths, please consult our technical staff.