Shin Yi flap check valve – Taiwan

Shin Yi flap check valve – Taiwan distributed by Tiger steel, We specialize in supplying Shin Yi flap check valve, cast iron Shin Yi valve.


What is a Flap Check Valve?

The check valve is a type of valve used to protect against reverse flow, allowing flow only in one direction and preventing it from flowing in the opposite direction. The valve leaf is designed to tilt 45° so it closes very quickly, minimizing the impact of the flow. The valve operates fully automatically based on the flow force of the water flow. The valve is connected to the flange system on both sides.


The flap check valve is composed of two main components, the valve body and the valve leaf:

– Valve: cast from FCD450 spherical cast iron, both sides are coated with high-grade epoxy paint with a thickness of  ≥300 μm

– Valve blade: round disc manufactured from FCD450 spherical cast iron, 100% covered with EPDM rubber, suitable for both clean water and wastewater environments

Working principle

When there is no fluid flow through the valve, the  lá valve under the action of its own weight should be held firmly in the “Closed” position. When flow occurs to the valve, under the action of flow, the valve leaf is pushed out of the closed position and allows flow to pass through the valve. When the flow stops, the valve blade counters the backflow pressure and its own weight returns to the closed position, preventing backflow of water in the direction of the valve inlet. Thus, the operation of the one-way valve is completely automatic under the action of the liquid flow.


– Operation automatic based on the force of water flow, opening and closing quickly because the valve leaf is designed to tilt 45°.

– Valves are manufactured from cast iron FCD450, EPDM rubber for high durability, anti-rust, safe for clean water.

– The valve is light in weight, compact in design, and takes up little space when installed.

Notes on installation:

The  flap check valve is installed in a two-flange system so the following points should be noted when installing:

– Install the valve in the correct opening direction of the valve leaf.

The distance between the two flanges should be just enough to install the valve.
– Gaskets between flanges and valves can be used to increase system tightness.
– The pipe flange size must be the same as the valve flange size.

Product Code

Product Code


DN50 – DN600
Size Range

Working Pressure

JIS 10K/16K
Pressure Rating

Working temperature

-10 ~ 80 ºC
Working Temp

Work environment

Water, Wastewater, Salty Water
Working Flow

Design standards

BS EN 1074-3
Design Standard

Distance Between 2 Flanges

ASME B16.10
Face To Face Standard

Standard Flange/Connection

BS EN 1092-2
ISO 7005-2
ASME B16.42
JIS B2220

The main products that  Tiger Steel  is providing:

Steel pipe

  • Imported seamless steel pipe (directly)
    Imported large diameter steel pipe (directly)
  • Steel pipe Hoa Phat, SeAH, 190…

Steel tube (square)

  • Steel square with galvanized Hoa Phat, Nam Kim…
  • Large steel square super-thick  steel tube (directly imported)

Pipe Fittings

  • Welding fitting A234 x SCH20/40/80 (nhập khẩu trực tiếp)
  • Welding fitting FKK Vietnam (distributor)
  • Threaded fittings are made of materials: galvanized cast iron, alloy copper, stainless steel 201, 304, 316, high pressure steel…
  • High pressure fittings ASME A105 class 3000psi/ 6000psi
    Steel and stainless steel flanges

Fire protection materials

  • Types of fire fighting equipment such as: fire extinguishers, fire balls…
    All kinds of materials and equipment for construction of firefighting systems such as: fire cabinets, angle valves, nozzles, water waiting throats, exit lights, automatic fire sprinklers, control centers, nozzles, hose reels , command signal, lights, speakers, fire alarms, emergency buttons… (full automatic fire fighting system).

Industrial valves

  • Cast iron valves, flanged stainless steel valves such as: gate valve (submersible, floating), ball valve, butterfly valve (handle, crank), globe valve, check valve (flip leaf, spring), Y strainer , magnifier (pump), float valve, air release valve, safety valve, pressure relief valve…
    Threaded valves made of copper or stainless steel such as gate valves, ball valves, check valves, filters, pump baskets, air release valves, pressure relief valves, etc.

Water meter

  • Types of water flow meter brands Komax, Bao Tin, Sanpo…
    Flow meter for hot water, hot steam


  • Stainless steel pipe, Stainless steel square inox 201 and 304
  • Decorative and industrial stainless steel
    Stainless steel pipe fittings of all kinds

Shape steel

  • shape steel  I, H
  •  U shape
  • steel angle V
  • Purlin C, roofing sheet metal.

Steel plate

  • Types of plain steel plate, common ribbed steel plate
    cutting plate,  cut the flat bar as required

Types of auxiliary materials

  • Steel and stainless steel bolts
    Deck Welding Nails
    sag rod
    Young rubber tape

Tiger Steel can provide enough materials for you to erect a new factory building, as well as the entire large and small pipeline system. With more than 10 years of experience, we are confident to provide you with guaranteed quality products at the best prices!

We import all kinds of  large diameter steel pipes, seamless steel pipes  from China with extremely flexible payment policy, very fast import time (for products that are not available in Vietnam). Please contact us immediately to receive a quote.

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