Flange Connection Check Valve (fully Lined, Swing-open Type)

The flange connection fully lined swing-open type check valve is a high-performance industrial valve designed for unidirectional fluid flow control in corrosive, abrasive, or high-purity medium systems. Adopting a swing-open structural design and full lining technology, this valve effectively prevents medium backflow while isolating the valve body’s metal structure from the conveyed medium through advanced lining materials.

I. Product Introduction

Suitable for chemical, petroleum, pharmaceutical, food and beverage, and wastewater treatment industries, it can handle various aggressive media such as acids, alkalis, salts, and organic solvents. The flange connection design ensures easy installation, reliable sealing performance, and convenient maintenance in pipeline systems. As a key component of fluid control systems, this valve provides stable operation, long service life, and excellent corrosion resistance, meeting the strict requirements of modern industrial production for pipeline safety and efficiency.

II. Product Features

Full Lining Corrosion Resistance

The valve body, inner cavity, and sealing surface are fully lined with high-quality materials such as FEP, PCTFE, PFA, and PO. This design completely isolates the metal substrate from the medium, providing superior corrosion and chemical resistance, and adapting to various harsh working conditions.
Swing-open Structure for Reliable Sealing

Adopting a swing-open flap design, the valve realizes automatic opening and closing relying on the pressure difference of the medium. When the medium flows forward, the flap opens smoothly with low flow resistance; when the medium tends to backflow, the flap closes rapidly under the combined action of backflow pressure and its own weight, ensuring tight sealing and effectively preventing backflow.
Standard Flange Connection

The valve adopts flange connection in accordance with HG/T 20592 standard (or customized according to customer requirements), which is consistent with the installation dimensions of general industrial pipelines. It features simple and quick installation, strong connection stability, and good sealing performance, effectively avoiding pipeline leakage at the connection.
Diversified Material Configuration

The main components of the valve can be flexibly configured with different materials, including gray cast iron, carbon steel, stainless steel, and ultra-low carbon stainless steel, to adapt to different working pressures, temperatures, and medium characteristics. Customers can choose the most suitable material combination according to actual application scenarios.
Low Maintenance Cost

The structural design is simple and reasonable, with few wearing parts. The high-quality lining material and precision-machined components ensure the valve’s long service life. In case of failure, only the lining, flap, or sealing parts need to be replaced, without the need for overall valve replacement, greatly reducing the maintenance cost and downtime of the system.
Compliance with National Standards

The valve is designed, manufactured, and tested in strict accordance with national standards such as GB/T12236, GB/T 12221, and GB/T 13927, ensuring stable product quality, reliable performance, and strong interchangeability, which is convenient for customers to integrate into existing pipeline systems.

III. Technical Data

1. Basic Parameters

Parameter	Specification
Nominal Pressure	PN0.6~1.6 (MPa)
Nominal Diameter	DN15~500 (mm)

2. Implementation Standards

Standard Category	Standard Number
Design and Manufacturing	GB/T12236
Structure Length	GB/T 12221 (long-short series)
Flange Size	HG/T 20592 (or as required by the contract)
Pressure Test	GB/T 13927
Symbolization	GB/T 12220
Filling	GB/T 12252

3. Main Parts and Components Material Table

Serial Number	Part Name	Gray Cast Iron (Z)	Carbon Steel (C)	Stainless Steels (P)	Stainless Steels (R)	Ultra-low Carbon Stainless Steel (PL)	Ultra-low Carbon Stainless Steel (RL)
1	Valve body, valve cover	HT250	WCB	CF8	CF8M	CF3	CF3M
2	Lining/seat	FEP(F46), PCTFE(F3), PFA(Soluble polytetrafluoroethylene), PO(polyolefin)	FEP(F46), PCTFE(F3), PFA(Soluble polytetrafluoroethylene), PO(polyolefin)	FEP(F46), PCTFE(F3), PFA(Soluble polytetrafluoroethylene), PO(polyolefin)	FEP(F46), PCTFE(F3), PFA(Soluble polytetrafluoroethylene), PO(polyolefin)	FEP(F46), PCTFE(F3), PFA(Soluble polytetrafluoroethylene), PO(polyolefin)	FEP(F46), PCTFE(F3), PFA(Soluble polytetrafluoroethylene), PO(polyolefin)
3	Shaft, Flap (Plate)	25	25	1Cr18Ni9/CF8	00Cr17Ni14Mo2/CF3M	1Cr18Ni9/CF8	00Cr17Ni14Mo2/CF3M
4	Bolt (male component of nut and bolt)	35	35	0Cr18Ni9	0Cr18Ni9	0Cr18Ni9	0Cr18Ni9
5	Nut (female component of nut and bolt)	45	45	0Cr18Ni9	0Cr18Ni9	0Cr18Ni9	0Cr18Ni9

Ⅳ．The main shape and connection size

Main connection dimensions and weight (H44F46)

Nominal diameter DN(mm	Standard value (unit: mm)							reference point
	L	D	D₁	D₂	f	b	Z-Φd	H	W(kg)
	PN0.6(MPa)
15	150	80	55	40	3	12	4-Φ11	55	4
20	150	90	65	50	3	14	4-Φ11	58	5
25	160	100	75	60	3.5	14	4-Φ11	60	6
32	180	120	90	70	3.5	14	4-Φ14	75	7
40	200	130	100	80	3.5	14	4-Φ14	82	8
50	230	140	110	90	4	14	4-Φ14	95	10
65	290	160	130	110	4	14	4-Φ14	105	20
80	310	190	150	128	4	16	4-Φ18	120	25
100	350	210	170	148	4.5	16	4-Φ18	135	30
125	400	240	200	178	4.5	18	8-Φ18	158	50
150	480	265	225	202	4.5	18	8-Φ18	180	65
200	495	320	280	258	5	20	8-Φ18	215	137
250	622	375	335	312	5	22	12-Φ18	240	150
300	698	440	395	365	5	22	12-Φ22	265	185
350	787	490	445	415	5	22	12-Φ22	300	215
400	914	540	495	465	6	22	16-Φ22	360	244
450	978	595	550	520	6	22	16-Φ22	385	276
500	978	645	600	570	6	24	20-Φ22	415	315
600	1295	755	705	670	6	30	20-Φ26	540	410

Main connection dimensions and weight (H44F46)

Nominal diameter DN(mm)	Standard value (unit: mm)							reference point
	L	D	D₁	D₂	f	b	Z-Φd	H	W(kg)
	PN1.0(MPa)
15	130	95	65	45	3	16	4-Φ14	55	5
20	150	105	75	58	3	18	4-Φ14	58	7
25	160	115	85	68	3.5	18	4-Φ14	60	9
32	180	140	100	78	3.5	18	4-Φ18	75	11
40	200	150	110	88	3.5	18	4-Φ18	82	13.5
50	230	165	125	102	4	18	4-Φ18	95	18
65	290	185	145	122	4	18	8-Φ18	105	22
80	310	200	160	138	4	20	8-Φ18	120	28
100	350	220	180	158	4.5	20	8-Φ18	135	34
125	400	250	210	188	4.5	22	8-Φ18	158	58
150	480	285	240	212	4.5	22	8-Φ22	180	72
200	495	340	295	268	5	24	8-Φ22	215	150
250	622	395	350	320	5	26	12-Φ22	240	165
300	698	445	400	370	5	26	12-Φ22	265	190
350	787	505	460	430	5	26	16-Φ22	300	225
400	914	565	515	482	5	26	16-Φ26	360	254
450	978	615	565	532	6	28	20-Φ26	385	285
500	978	670	620	585	6	28	20-Φ26	415	333
600	1295	780	725	685	6	34	20-Φ30	540	410

Main connection dimensions and weight (H44F46)

Nominal diameter DN(mm)	Standard value (unit: mm)							reference point
	L	D	D₁	D₂	f	b	Z-Φd	H	W(kg)
					PN1.6(MPa)
15	130	95	65	45	3	16	4-Φ14	55	6
20	150	105	75	58	3	18	4-Φ14	58	7.8
25	160	115	85	68	3.5	18	4-Φ14	60	10
32	180	140	100	78	3.5	18	4-Φ18	75	12.5
40	200	150	110	88	3.5	18	4-Φ18	82	14.5
50	230	165	125	102	4	18	4-Φ18	95	19.5
65	290	185	145	122	4	18	8-Φ18	105	25.5
80	310	200	160	138	4	20	8-Φ18	120	30
100	350	220	180	158	4.5	20	8-Φ18	135	36
125	400	250	210	188	4.5	22	8-Φ18	158	62
150	480	285	240	212	4.5	22	8-Φ22	180	78
200	495	340	295	268	5	24	12-Φ22	215	156
250	622	405	355	320	5	26	12-Φ26	240	172
300	698	460	410	378	5	28	12-Φ26	265	240
350	787	520	470	428	5	30	16-Φ26	300	208
400	914	580	525	490	5	32	16-Φ30	350	265
450	978	640	585	550	4	34	20-Φ30	385	285
500	978	715	650	610	4	34	20-Φ33	415	333
600	1295	840	770	725	6	36	20-Φ36	540	410

About Us

Founded in 2016, Shanghai Wangye Valve Manufacturing Co., Ltd. is a professional industrial fluid control manufacturer with nearly a decade of experience, integrating R&D, intelligent production, sales, and customized solutions. Leveraging Shanghai’s advanced manufacturing advantages, we’ve built a reliable brand across petrochemicals, power, metallurgy, water treatment, and new energy industries, offering gate/ball/butterfly valves and tailored solutions for harsh conditions. Backed by advanced equipment, full-process quality control, and ISO certifications, we adhere to “Integrity, Quality, Customer Focus, Innovation” and provide comprehensive services, striving for long-term cooperation and continuous technological upgrading.

Why Choose Us

Talent and Efficient Team

WYE always insists that employees are the most valuable asset of the enterprise and the future of WYE; Adhere to prioritizing talent selection, education, and utilization in the development of enterprises; introducing talent as the highest return investment behavior. We regard talent as the primary resource for effective management, and pursue a high degree of harmony and unity between employee personal development and enterprise development.We encourage you to have a special perspective, think independently, and be good at organizing resources from all parties. Always maintain a responsible attitude towards results and a positive team spirit that is willing to share in every task..

High End Processing Equipment Creating Excellent Product Quality

Advanced automated production equipment and sophisticated assembly line production demonstrate first-class quality.Technical experts directly participate in production to ensure the concealment and reliability of the product.The increasing awareness of high-quality products and the continuous supply of industrial products have made WYE constantly changing.No matter how the world changes, the persistent spirit of excellence among WTE people remains unchanged.

Warehouse Strength

In our facility, raw materials (including core components and packaging supplies) are strictly controlled via a real-time digital inventory system—tracking batches, shelf life, and storage conditions to boost traceability and cut waste. Semi-finished products, post-preliminary quality checks, are stored per strict industry standards: labeled with progress/inspection records to avoid cross-contamination and damage. Finished products are sorted into specialized warehouses by type, market, and delivery schedule, streamlining picking and reducing dispatch delays. This standardized process effectively boosts efficiency: cutting redundant steps by 30%, shortening fulfillment cycles by 20%, and minimizing inventory/shipment errors.

Customized Solutions & After-Sales Support

Tailored to the distinct demands of industries like petrochemicals, new energy, and metallurgy, WYE provides personalized industrial fluid control solutions—covering pre-project demand assessment, customized valve design (matching specific working conditions like pressure or medium type), and on-site technical consultation to align with clients’ operational scenarios. Additionally, we offer comprehensive after-sales support: including on-site installation guidance, regular equipment maintenance inspections, and 24/7 responsive fault troubleshooting, which ensures the stable operation of clients’ systems and strengthens long-term cooperative partnerships.

Our Services

Our company is a one-stop solution for all valve-related needs, offering customization to tailor valves to unique specifications, professional installation & commissioning for seamless integration and optimal performance, maintenance & repair to keep valves in top condition and extend their lifespan, and technical support & consultation for expert advice on selection, optimization, and troubleshooting throughout every project stage.

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EXHIBITION & PROJECTS

COOPERATIVE PARTNER

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Flange Connection Check Valve (fully Lined, Swing-open Type)

I. Product Introduction

II. Product Features