Product classification of Kaiweixi

KAI WEI XI CHAN PIN FEN LEI

JIS Standard Stop-Check Valve
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Phone：+86（577）6730 7899
Mobile：+86 189 6779 6135
Fax：+86（577）6738 7099
Email：Yannie@kaiweixi.com
Address：No. 1, Linxia Road, Sanqiao Industrial Zone, Oubei Street, Yongjia County, Zhejiang Province，china
Website：https://www.kaiweixi.com

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JIS Standard Stop-Check Valve

Model：J41H-5K/J41H-10K/J41H-20K/J41Y-5K/J41Y-10K/J41Y-20K
Specification：1/2”- 16”
Temperature：≤550℃
Medium：Water, steam, oil and similar liquids, gases

Pressure：5K/10K/20K
Connection method：flange
Driving method：Handwheel
Material：Cast steel, stainless steel

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JIS Standard Stop-Check ValveOverview

Overview

The JIS standard stop valve is a pipeline shut-off valve strictly designed and manufactured according to Japanese Industrial Standards (JIS). It utilizes a stem to drive the disc in a vertical lifting motion along the centerline of the seat, enabling the opening, closing, and flow regulation of the medium within the pipeline. Its design and manufacturing strictly adhere to standards such as JIS B2002 (face-to-face dimensions), JIS B2210 (flange dimensions), and JIS B2071/2081 (cast iron/cast steel stop valves), ensuring precise matching and interchangeability with JIS standard piping systems. Structurally, the valve body and bonnet employ a flanged bolted connection or a pressure self-sealing design. The sealing surfaces of the disc and seat are overlaid with hard alloy and precision ground, forming a wear-resistant and corrosion-resistant metal sealing pair. This, combined with a precision-machined stem and high-quality packing, creates a reliable sealing system that effectively prevents internal and external media leakage. The valve can be equipped with manual, electric, or pneumatic actuators as required. It is widely used in process piping systems within the petroleum, chemical, light industry sectors, and in joint ventures involving Japanese partners. It is particularly suitable for the isolation and control of non-corrosive or mildly corrosive media such as water, steam, and oil, serving as a critical control component ensuring the safe and reliable operation of JIS standard piping systems.

JIS Standard Stop-Check Valve Product Image

JIS Standard Stop-Check ValveCharacteristic

Features

1、Strict Compliance with JIS Standard System: Strictly designed and manufactured according to Japanese Industrial Standards such as JIS B2002, JIS B2210, and JIS B2071/2081. The face-to-face dimensions, flange connection sizes, and pressure-temperature ratings are fully compatible with JIS standard piping systems, ensuring precise interchangeability and reliable connection with JIS standard pipes and equipment.

2、Excellent Sealing Performance: The sealing surfaces of the disc and seat are overlaid with cobalt-based hard alloy or Stellite. Through precision grinding, they form a high-hardness, wear-resistant metal sealing pair that effectively resists media erosion, achieving positive shut-off and meeting zero-leakage requirements.

3、Adaptability to Harsh Conditions: Key pressure-containing parts are manufactured from high-quality stainless steel or heat-resistant alloy steel, offering excellent high-temperature strength and corrosion resistance. The sealing surfaces undergo special hardening treatment, ensuring long-term stable operation under high temperature, high pressure, and in harsh media containing trace particles.

4、Reliable Stem Sealing: The contact area between the stem and packing is precision-polished. Combined with flexible graphite or formed PTFE packing, evenly compressed by the packing gland, it forms a reliable dynamic sealing structure that effectively prevents external media leakage and enhances system safety.

5、Smooth and Flexible Operation: The top of the disc is connected to the stem via a T-slot and features a precise guiding structure, ensuring smooth operation without binding during opening and closing. It can be configured with a handwheel, bevel gear, electric, or pneumatic actuator, offering low operating torque and clearly discernible open/close positions.

6、Compact Structure, Convenient Maintenance: The compact structural design results in light overall weight and requires minimal installation space. The bonnet utilizes a flanged bolted connection or a pressure self-sealing structure, facilitating internal valve inspection and easy replacement of sealing components, thereby reducing maintenance costs.

7、Broad Applicability: Suitable for various non-corrosive or mildly corrosive media such as water, steam, oil, and gas. Widely used in process piping systems within the petroleum, chemical, light industry, textile sectors, and joint ventures involving Japanese partners. It is a key shut-off and control component in JIS standard piping systems.

JIS Standard Stop-Check Valvestructure principle

JIS Standard Stop-Check Valve Structure Diagram

零部件名称材料表Part Name and Material List

阀盖阀瓣	A216 WCB	A352 LCB	A217 WC6	A217 WC9	A217 C5	A351 CF8	A351 CF8M	A351 CF3	A351 CF3M
阀杆	A182 F6	A182 F304					A182 F316	A182 F304L	A182 F316L

JIS Standard Stop-Check Valvetechnology parameter

Performance Specification Table

性能规范表Performance Specification Table
公称压力Nominal Pressure	10K/20K	MPa
适用温度Applicable Temperature	≤550	℃

JIS Standard Stop-Check Valvestandard size

JIS Standard Stop-Check Valve Dimensional Drawing

JIS Standard Stop-Check Valve Dimensional Table

10K	规格Size(mm) 尺寸Dimensions(mm)
	inch	DN	L	D	D1	D2	b	z-Φd	H	D0
	1/2”	15	108	95	70	52	12	4-Φ15	200	100
	3/4"	20	117	100	75	58	14	4-Φ15	205	120
	1"	25	127	125	90	70	14	4-Φ19	230	140
	11/4”	32	140	135	100	80	16	4-Φ19	240	140
	11/2”	40	165	140	105	85	16	4-Φ19	270	160
	2"	50	203	155	120	100	16	4-Φ19	300	200
	21/2”	65	216	175	140	120	18	4-Φ19	340	220
	3”	80	241	185	150	130	18	8-Φ19	360	240
	4”	100	292	210	175	155	18	8-Φ19	420	280
	5”	125	356	250	210	185	20	8-Φ23	460	350
	6”	150	406	280	240	215	22	8-Φ23	500	400
	8"	200	495	330	290	265	22	12-Φ23	590	450
	10"	250	622	400	355	325	24	12-Φ25	710	500
	12"	300	698	445	400	370	24	16-Φ25	810	550
	14”	350	787	490	445	415	26	16-Φ25	880	600
	16”	400	914	560	510	475	28	16-Φ27	940	650
20K	inch	DN	L	D	D1	D2	b	z-Φ d	H	D0
	1/2"	15	152	95	70	52	14	4-Φ 15	220	120
	3/4"	20	178	100	75	58	16	4-Φ 15	230	120
	1"	25	203	125	90	70	16	4-Φ 19	260	140
	11/4”	32	216	135	100	80	18	4-Φ 19	280	140
	11/2”	40	229	140	105	85	18	4-Φ 19	300	200
	2”	50	267	155	120	100	22	8-Φ 19	330	240
	21/2”	65	292	175	140	120	24	8-Φ 19	360	240
	3”	80	318	200	160	135	26	8-Φ 23	400	280
	4”	100	356	225	185	160	28	8-Φ 23	450	320
	5”	125	400	270	225	195	30	8-Φ 25	500	400
	6”	150	444	305	260	230	32	12-Φ 25	540	450
	8”	200	559	350	305	275	34	12-Φ 25	670	500
	10"	250	622	430	380	345	38	12-Φ 27	770	550
	12"	300	711	480	430	395	40	16-Φ 27	855	600
	14”	350	762	540	480	440	44	16-Φ 33	920	650
	16”	400	864	605	540	495	46	16-Φ 33	970	700

Articles related to technology research and development

Slow-closing wafer check valve patent

The utility model provides a slow-closing wafer check valve, which includes a valve body, a valve disc, a valve shaft, and a torsion spring sleeved on the valve shaft. The valve body is provided with a medium channel for medium circulation in the axial direction, which includes an inlet end and an outlet end. The valve disc, valve shaft, and torsion spring are symmetrically arranged in two groups relative to the center of the valve body. The utility model further includes a damping device located at the inlet end, which includes a cylinder inserted on the valve body, a piston rod located inside the cylinder, a spring, and a cover connected to the outer end of the cylinder. The cylinder is provided with a first cavity and a second cavity that are connected and communicated. The cross-section of the second cavity is square, and its cross-sectional area is larger than that of the first cavity. One end of the piston rod located inside the medium channel is provided with a movable block. The utility model has low noise and technical characteristics of quick opening, slow closing, and water hammer elimination, enabling light-load pump start-up and preventing the generation of water hammer during pump shutdown.
1. A slow-closing wafer check valve, comprising a valve body, a valve disc, a valve shaft, and a torsion spring sleeved on the valve shaft. The valve body is provided with a medium passage for medium circulation in the axial direction, and the medium passage includes an inlet end and an outlet end. The valve disc, valve shaft, and torsion spring are symmetrically arranged in two groups relative to the center of the valve body. The valve also comprises a damping device located at the inlet end. The damping device includes a cylinder inserted on the valve body, a piston rod located inside the cylinder, a spring, and a cover connected to the outer end of the cylinder. The cylinder is provided with a first cavity and a second cavity that are connected and communicated. The cross-section of the second cavity is square, and the cross-sectional area of the second cavity is larger than that of the first cavity. One end of the piston rod is located inside the second cavity, and the other end penetrates through the first cavity and is located inside the medium passage. The end of the piston rod located inside the medium passage is provided with a movable block, and the end of the piston rod located inside the second cavity is provided with an external thread. The second cavity is provided with a limit plate that is adapted to and threadedly connected with the piston rod. The spring is sleeved on the piston rod, with one end abutting against the limit plate and the other end abutting against the inner wall of the second cavity. The side of the valve disc facing the piston rod is provided with a driving block that cooperates with the movable block. During the closing process of the valve disc, the side of the driving block facing the center of the valve body cooperates with the movable block to achieve displacement of the piston rod relative to the cylinder towards the center of the valve body. The damping device is symmetrically arranged in two groups relative to the center of the valve body.
2. A slow-closing wafer check valve according to claim 1, characterized in that a square hole is axially provided at the end of the piston rod located in the second cavity, an adjuster is inserted at a position on the cover corresponding to the square hole, a driving rod adapted to the square hole is provided at the end of the adjuster, and the adjuster is rotatable relative to the cover.
3. A slow-closing wafer check valve according to claim 2, characterized in that a limit slot is provided at the connection between the cover and the regulator, and a limit mechanism is arranged inside the limit slot. The limit mechanism comprises a ball, a tower spring connected to the ball, and a positioning column for fixing the tower spring. At least four engaging slots adapted to the ball are provided circumferentially at the connection between the regulator and the cover.
4. A slow-closing wafer check valve according to claim 3, characterized in that the top edge of the engaging groove is provided with a rounded corner.
5. A slow-closing wafer check valve according to claim 1, characterized in that the valve body is provided with a stepped groove adapted to the cylinder body.
6. A slow-closing wafer check valve according to claim 5, characterized in that a sealing ring is sleeved at the connection between the cylinder and the valve body.
7. A slow-closing wafer check valve according to claim 1, characterized in that the valve disc is provided with a build-up welding layer that is sealed with the valve body. 8. A slow-closing wafer check valve according to claim 7, characterized in that one side of the build-up welding layer is provided with vulcanized rubber that is sealed with the valve body.

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Product classification of Kaiweixi

KAI WEI XI CHAN PIN FEN LEI

JIS Standard Stop-Check Valve

More API, JIS, DIN, GOST check valves>>

More check valve>>

More valve>>

JIS Standard Stop-Check Valve