+
  • 橡胶瓣止回阀1.jpg
  • 橡胶瓣止回阀2.jpg

Rubber flap check valve

A valve is a mechanical device that controls the flow rate, flow direction, pressure, temperature, etc. of a flowing fluid medium. Valves are the basic components in piping systems. Valve fittings, like pumps in technology, are often discussed as a separate category.

Key words:

Classification:

Ductile iron valve series

Product Consulting:

Description


A valve is a mechanical device that controls the flow rate, flow direction, pressure, temperature, etc. of a flowing fluid medium. Valves are the basic components in piping systems. Valve fittings, like pumps in technology, are often discussed as a separate category. The valve may be operated manually or with a hand wheel, handle or pedal, and may also be controlled to vary the pressure, temperature and flow rate of the fluid medium. The valve can perform continuous or repeated operations on these changes, such as safety valves installed in hot water systems or steam boilers. In more complex control systems, automatic control valves are used as required by external inputs (I. e., to adjust the changing set point of the flow through the pipeline). The automatic control valve does not need to be manually operated according to its input and setting, so that the valve can accurately control the various requirements of the fluid medium. Valves can also be divided into cast iron valves, cast steel valves, stainless steel valves, chromium molybdenum steel valves, chromium molybdenum vanadium steel valves, dual phase steel valves, plastic valves, non-standard customized valve materials, etc.

◆ Product overview

H44X rubber flap check valve adopts inclined structure, the whole basin area to ensure the smooth flow of water, the main components of the valve is: valve body, valve cover, steel shaft, rubber plate. The non-return rubber flap is coated with reinforced nylon cloth outside the steel plate and coated with nitrile rubber as a whole. The coated rubber is tightly attached, with accurate geometric dimensions and good sealing elasticity, so that the steel plate is completely isolated from the fluid. In order to make the valve flap have good opening and closing elasticity, the upper part of the valve flap is designed without steel frame, and the back of the rubber flap is designed with elastic limiting device. When the rubber flap is closed in place, it forms a 45 angle with the valve axis, in order to reduce the opening resistance and realize quick opening and quick closing. Between the valve cover and the valve body with O-ring seal, rubber flap switch life can reach 1 million times.

◆Technical parameters

DN DN50-300
PN 1.6MPa
Test pressure Strength 2.4MPa
Seal 1.8MPa
Temperature 0-80 ℃
Medium Water

 

 ◆ Material of main parts

Serial Number Part Name Material Standard
1 Valve body QT450-10 DIN 1693
2 Baffle EPDM WCB ASTM A126/ISO4633
3 Bonnet gasket NBR ISO 4633
4 Bonnet QT450-10 DIN 1693
5 Pin 2Cr13 ASTM A276
6 Bolt 304 ASTM A276
7 Washer 304 ASTM A276
8 Nut 304 ASTM A276
9 Sealing ring NBR ISO 4633

 

◆ Main outline connection dimension

DN L D D1 D2 Z-Fd B f H
50 203 165 125 99 4-19 19 3 88
65 216 185 145 118 4-19 19 3 100
80 241 200 160 132 8-19 19 3 108
100 292 220 180 156 8-19 19 3 118
125 330 250 210 184 8-19 19 3 150
150 356 285 240 211 8-23 19 3 160
200 495 340 295 266 12-23 20 3 250
250 622 405 355 319 12-28 22 3 295
300 698 460 410 370 12-28 24.5 4 330

Note: The flange size in this table is in accordance with GB/T17241.6 standard, and the structure length is in accordance with GB/T 12221-2005 standard.

Product inquiry