Stainless Steel Knife Gate Valve By Tianjin Tanghai Valve Manufacturing Co., Ltd

Knife Gate valve (TH-PZV)

The opening and closing part of the knife gate valve is the knife /gate, and the movement direction of the gate is perpendicular to the direction of the fluid. The manual knife gate valve can only be fully opened and fully closed, and cannot be adjusted or throttled. The gate has two sealing surfaces, The two sealing surfaces of the most commonly used mode gate valve form a wedge, and the wedge angle varies with valve parameters, usually 50. The gate of the wedge knife gate valve can be made into a whole, called a rigid gate; it can also be made A gate that can produce a small amount of deformation to improve its process characteristics and make up for the deviation of the angle of the sealing surface during the processing.This kind of gate is called an elastic gate.

When the knife gate valve is closed, the sealing surface can only rely on the medium pressure to seal, that is, rely on the medium pressure to press the sealing surface of the gate to the valve seat on the other side to ensure the sealing of the sealing surface, which is self-sealing. The gate valve adopts forced sealing, that is, when the valve is closed, the gate must be forced to press against the valve seat by external force to ensure the sealing performance of the sealing surface

Area of application

Knife gate valve is suitable for viscous particles, often used in beverage, paper-making, pulp industry, industrial sewage, urban sewage treatment, chemical plants, bulk material transportation, fly ash treatment industries;

Technical Parameters /Properties of Butterfly valve

TYPE:Wafer, lug, double flanged
SIZE & CONNECTIONS:DN50 to D1800
MEDIUM:Oil, Mud, material, viscous, granular fluid
MATERIALS:Cast Iron / Ductile Iron/ Carbon Steel / Stainless steel / Alu Bronze
PRESSURE RATING:PN10, PN16, 150LB,
TEMPERATURE:-30A C to 200A C
SEAT/LINING:Resilient seated
NBR/EPDM/VITON, metal seated.
CERTIFICATES & APPROVALS:DNV-GL, Lloyds, DNV, ABS, BV Type Approval
3.1 & 3.2 Cert (on request)
Standards

Design and Manufacture Conform to EN 593a MSS SP-81
Flange dimensions Conform to EN 1092-2, ANSI B16.5
Face to Face dimensions Conform to TAPPI TIS405.8
Topworka s dimensions Conform to ISO5211
Testing Conform to API598a MSS SP-81
Material of Parts

PART NAMEMaterial
BODYGG25/GGG40, WCB, CF3,CFCM,CF8,CF8M,
SEATNBR/EPDM/VITON
DISCSS201/304/316, 2Cr13
PACKINGPTFE /Kelvar
GLANDGG25/GGG40,WCB, SS
STEM NUTQAL9-4
STEM2Cr13
YOKEQ235A
SUPPORTCarbon Steel
HAND WHEELHT250
BOLTS/NUTSA193 B7 /A194 2H
BEARINGBearing Steel
CAPSteel
Actuation

Hand lever
Worm-gear/hand-wheel
Electric-actuator
Pneumatic-actuator
Hydraulic-actuator
Types of knife gate valves:

Knife gate valve driving mode: manual, electric, pneumatic, hydraulic, bevel gear, electro-hydraulic and pneumatic-hydraulic driving modes.
Knife gate valve shape: two kinds of rising stemand non-rising stem.
Knife gate valve material: cast iron, cast steel, carbon steel, stainless steel, fluorine lining, etc.
Knife gate valve seal: hard seal, soft seal, single-sided seal, double-sided seal and other materials.