Swing Check Valve

 

A basic swing check valve comprises a valve body, a bonnet, and a disk hinged for movement. The disk pivots away from the valve seat to permit flow in the forward direction and returns to the seat upon cessation of upstream flow, effectively preventing backflow.

 

The disk in a swing check valve operates unguided during its full range of motion, from fully open to fully closed. Various disk and seat designs are available to cater to the needs of diverse applications. These valves ensure unimpeded flow and automatically shut off as pressure diminishes. When flow ceases, the valves close completely to prevent backflow. Turbulence and pressure drop within the valve are minimal.

 

The key construction features of the GZP Swing Check Valve are as follows:

● Built-in Trim Structure Design

The GZP check valve features a built-in design, with the valve disk and hinge arm housed within its internal chamber. This design minimizes flow disruption and reduces potential leakage points.

●Integral Forged or Rolled Body Seat or Seat Welded and Overlaid with Various Materials

The welded overlay is rigorously executed according to approved WPS procedures. Following welding and all necessary heat treatment, the seat ring surfaces undergo machining, thorough cleaning, and inspection before being assembled.

● Large Sizes Equipped with Lifting Rings for Ease of Installation
For larger sizes, a lifting ring is provided to facilitate installation. Swing check valves can be installed in either a horizontal or vertical orientation.

 

Technical Data
Design Standard	API6D, BS1868, DIN3356,EN10739
Body Material	ASTM A216WCB,
	NACE MR-01-75/NACE MR-01-03 Special Requirements
Pressures range	ANSI 150 ~ANSI 2500 ,PN10~PN420
Size range	DN50(2") ~DN600 (24")
Face to Face	ANSI B16.10,EN 558,DIN3202
Flanged RF, FF, RTJ Ends	ASME B16.5 ≤ DN600 (24") ASME B16.47 A ≥ DN650 (26")
	BS 4504, DIN 2543-2545, EN1092
Butt-Weld BW Ends	ASME B16.25 ,DIN 3239,BS 2080, EN 12627
Temperature range	-29°~ 425°C
Design Feature
Construction	Lift type, Swing type, Wafer type, Pressure seal bonnet, Bolted Bonnet
Disc Type	Dual plate, single plate, plug type
Seat Sealing	Integral body seat, seat welded and overlaid
Fire Safe Design	API 607, BS 6755
Inspection & Test
Visual Inspection	MSS SP-55
Material Inspection	PMI Test----Chemical Analysis
	HB Test---Hardness Test
	UT---Ultrasonic Test
	RT---RadiographicTest
	MT---Magnetic Test
	NDT Test Non-destructive
Dimension inspection	According to drawings
Valve Inspection and Test	API 598, DIN 3230, EN 12266, BS 5146

 

Caution:

When installing a swing check valve without springs, ensure the cover is facing upwards, and the line's angle of inclination should not exceed 30 degrees from horizontal. Additionally, the roll angle of the valve bonnet should not surpass 30 degrees from side to side. Swing check valves can be installed in both horizontal and vertical positions (with flow upwards). However, it's crucial to note that in non-clean services, vertically installed swing check valves may accumulate dirt, sludge, and eventually jam. This installation mode is also inconvenient for maintenance and service. Before installing swing check valves in vertical pipes, please verify the media cleanliness or consult our engineering department.

 

Purpose of a Swing Check Valve:

A swing check valve is designed to allow fluid to travel in only one direction. An important feature of these valves is that they require no external power, making them suitable for various applications. When fully open, they allow fluid to pass through without significantly slowing the flow.

 

One of the most common applications of a swing check valve is a flapper valve in a flush toilet mechanism. It allows water to enter from the bottom of the tank but prevents it from draining out in the same way. Swing check valves are the most prevalent type of valve in water and wastewater pumping systems. In any situation where backflow could pose a problem, swing check valves are the preferred choice.

 

Our Company :

Since establishing our first factory in Wenzhou in 1996, we have been a professional manufacturer of valves, specializing in design, distribution, and after-sales service. Our objective is to be your preferred partner. We strive to offer products tailored to your exact requirements, deliver them on time, and provide exceptional support to meet today's quality standards in business.

 

Our WCB swing check valve is designed to prevent backflow in horizontal piping systems. It allows liquid to flow in a single direction and can be used in the water, oil, and gas industries. The valve seat is stellated for longer service life and is renewable. Tapered discs and seats minimize disc slamming, ensuring longer wear. Body ribs ensure a positive grip by the pipe fitter's wrench for screwed valve installations. Oblique and angle pattern valves are also available.

 

At GZP Group, our technical department boasts a CAD valves design center and a three-dimensional simulated manufacturing experimental design system. Our technical engineers, with over 30 years of experience, are capable of delivering optimal solutions for all your applications, ranging from general service to severe service, from manual to on-off automation, as well as sophisticated control systems.

 

Through constant innovation, design improvements, and reliable services, we have remained at the forefront of the valve industry. For years, we have received a good reputation from major oil companies, wellhead manufacturers, and service companies for critical applications. Our products can be manufactured according to international standards such as ISO, API, ANSI, BS, DIN, NF, JIS, JPI, GB, and JB, with valve sizes ranging from 1/4" to 80" (DN62000mm) and pressures from Class 150lb to 4500lb (PN10PN420), and design temperatures from -196 to 680°C.

 

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