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KAI WEI XI CHAN PIN FEN LEI

PQ40F Manual Eccentric Semi-ball Valve
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PQ40F Manual Eccentric Semi-ball Valve

Model：PQ40F-6Q/PQ40F-10Q/PQ40F-16Q//PQ40F-10C/PQ40F-16C//PQ40F-10P/PQ40F-16P
Specification：DN50-DN2000
Temperature：≤80℃
Medium：Water and water-like media

Pressure：PN6~PN16
Connection method：flange
Driving method：manual
Material：Ductile Iron, Cast Steel, Stainless Steel

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PQ40F Manual Eccentric Semi-ball ValveOverview

PQ40F Manual Eccentric Semi-ball Valve is a uniquely designed shut-off valve featuring intuitive operation. By manually rotating the handle or handwheel, the valve stem drives the eccentric hemispherical core to rotate approximately 90 degrees, enabling rapid on/off control of pipeline media. Its core innovation lies in the "eccentric" design—where the valve stem axis is pre-aligned with a offset from the hemispherical sealing surface. This configuration allows the hemispherical core to fully disengage from the valve seat during opening, eliminating friction, while the eccentric offset creates a wedge effect during closing to ensure airtight sealing. Particularly suited for demanding industrial applications, this valve excels in reliably cutting off slurries or gases containing solid particles such as mineral slurry, coal powder, and ash residues in sectors including power generation, metallurgy, mining, and chemical processing.

PQ40F Manual Eccentric Semi-ball Valve Product Diagram

PQ40F Manual Eccentric Semi-ball ValveCharacteristic

1. Excentric self-tightening seal: The valve features a unique single or double eccentric design. During closure, the eccentric hemispherical valve core presses against the seat in the final rotation phase through mechanical leverage, creating a self-tightening seal that tightens progressively. The sealing force increases with rising medium pressure, ensuring reliable shut-off.

2. Anti-wear and anti-scaling: When fully open, the hemispherical component completely disengages from the flow channel and retracts into the valve body, allowing direct medium flow without obstruction and preventing high-speed erosion of sealing surfaces. In closed position, its sharp edges scrape and remove sludge or deposits adhering to the valve seat, providing self-cleaning functionality that significantly extends service life in harsh media environments.

3. Manual operation is lightweight and reliable: The eccentric principle ensures instant disengagement between the hemispherical valve and seat during operation, dramatically reducing torque. With a simple 90-degree rotation, manual operation feels effortless and enables rapid opening/closing, providing a straightforward, dependable, and cost-effective control solution for applications without power or air supply.

4. Bidirectional sealing and flow characteristics: The meticulously designed sealing pair enables bidirectional sealing (both upstream and downstream), eliminating the need to consider the medium flow direction during installation. The straight-through flow channel achieves minimal flow resistance when fully open, functioning like a straight pipe to significantly reduce system pressure loss and deliver notable energy-saving benefits.

5. Economical and easy maintenance: The main sealing components (e.g., valve seats) are designed as detachable modules. When wear occurs on the sealing surfaces due to prolonged use, performance can be restored through simple compensation mechanisms or valve seat replacements, eliminating the need for complete valve replacement and keeping maintenance costs low.

PQ40F Manual Eccentric Semi-ball Valvestructure principle

PQ40F Manual Eccentric Semi-ball Valve Structure Diagram

List of Component Names and Materials

SNO	Component Name	Common materials
1	body	WCB（ZG230－450）、Cr18Ni9（304）、0Cr18Ni12Mo2Ti（316）、QT450
2	ball	ZG2Cr13、304、316、alloy nitrided steel
3	stem	2Cr13、1Cr18Ni9Ti、0Cr18Ni12Mo2Ti
4	seat	PTFE、flexible graphite、2Cr13、0Cr18Ni12Mo2Ti
5	cap	WCB、1Cr18Ni9Ti、Q235－A
6	bearing bushing	Bronze、0Cr18Ni9Ti、FZ－1 Composite Materials
7	packing	flexible graphite、PTFE
8	packing gland	1Cr13、0Cr18Ni9、WCB
9	Fasteners (e.g., double-ended bolts, hex nuts)	35CrMoA、1Cr17Ni2、Q235－A
10	support	WCB、304
11	sealing gasket	Stainless steel with flexible graphite、PTFE
12	clamping ring	QT450－10、1Cr18Ni9Ti
13	Positioning Circle/Double-Sided Ring	1Cr13、1Cr18Ni9Ti
14	Handwheel	Cast iron, carbon steel
15	Seal (O-ring, etc.)	Nitrile rubber (NBR)

PQ40F Manual Eccentric Semi-ball Valvetechnology parameter

Performance Specification Sheet

Performance Specification Sheet
Nominal Pressure	0.6	1.0	1.6	MPa
Strength test pressure	0.9	1.5	2.4
Sealing test pressure	0.66	1.1	1.76
Applicable Temperature	≤80			℃

PQ40F Manual Eccentric Semi-ball Valvestandard size

Standard requirements for external dimensions

1. The structural length of the valve shall comply with the standard of GB/T12221

2. Connecting flanges according to GB/T17241.6 standard

PQ40F Manual Eccentric Semi-ball Valve Outline Diagram

Outline dimension table

Nominal pressure	Nominal diameter	Size(mm)
Nominal pressure	Nominal diameter	L	D	K	d	b	f	Z-do	Hw	Hd
1.0Mpa	50	178	165	125	100	18	2	4-φ18	270	310
	65	190	180	145	120	18	2	4-φ18	280	320
	80	203	195	160	135	20	2	4-φ18	290	330
	100	229	220	180	156	22	2	8-φ18	330	360
	125	254	250	210	184	22	2	8-φ18	345	405
	150	267	285	240	211	24	2	8-φ22	370	440
	200	292	340	295	266	24	2	8-φ22	405	470
	250	330	395	350	319	26	2	12-φ22	480	540
	300	356	445	400	370	26	2	12-φ22	520	580
	350	430	505	460	429	26	2	16-φ22	570	630
	400	530	565	515	480	26	2	16-φ26	630	710
	450	580	615	565	530	28	2	20-φ26	690	770
	500	660	670	620	582	28	2	20-φ26	740	820
	600	840	780	725	682	34	2	20-φ30	840	940
	700	900	895	840	794	34	5	24-φ30	960	1040
	800	1000	1015	950	901	36	5	24-φ33	1080	1180
	900	1100	1115	1050	1001	38	5	28-φ33	1190	1280
	1000	1200	1230	1160	1112	38	5	28-φ36	1310	1420
	1100	1250	1340	1270	1222	42	5	28-φ36	1390	1480
	1200	1300	1455	1380	1328	44	5	32-φ39	1420	1530
	1400	1500	1675	1590	1530	48	5	38-φ42	1540	1650
	1600	1800	1915	1820	1750	52	5	40-φ48	1660	1750
	1800	2000	2115	2020	1950	26	5	44-φ48	1790	1860
	2000	2200	2325	2230	2150	60	5	48-φ48	1920	1990

Articles related to technology research and development

Wafer-type ball valve patented

The utility model provides a wafer-type float valve, which includes a valve body and a driving mechanism. The valve body is provided with a through medium channel in the axial direction, and is tubular in shape. It also includes a butterfly plate that fits and seals with the inner wall of the medium channel. The driving mechanism comprises a valve shaft that passes through the valve body and is connected to the butterfly plate, a valve rod connected to the outer end of the valve shaft in the radial direction, and a float ball connected to the valve rod. The valve rod is provided with a limit bolt that is threadedly connected to the valve body in the swinging direction. The butterfly plate can rotate relative to the valve body. The front end of the valve body at the inlet of the medium channel is provided with a filter screen, which is hollow and hemispherical in shape. The end face of the valve body opposite the filter screen is provided with an annular groove, and the open end of the filter screen is provided with a raised edge that is embedded in the annular groove. The utility model can filter the medium, is simple to install, time-saving, labor-saving, small in size, widely applicable, and can reduce the impact force of the medium on the butterfly plate.
1. A double-clip type float valve, comprising a valve body and a driving mechanism. The valve body is provided with a through medium channel in the axial direction. It is characterized in that the valve body is tubular and further comprises a butterfly plate that fits and seals with the inner wall of the medium channel. The driving mechanism comprises a valve shaft passing through the valve body and connected to the butterfly plate, a valve rod connected to the outer end of the valve shaft in the radial direction, and a float connected to the valve rod. The valve rod is provided with a limit bolt threadedly connected to the valve body in the swinging direction. The butterfly plate is rotatable relative to the valve body. The front end of the valve body located at the inlet of the medium channel is provided with a filter screen. The filter screen is hollow and hemispherical. The end surface of the valve body opposite the filter screen is provided with an annular groove. The open end of the filter screen is provided with a convex edge embedded in the annular groove.
2. A wafer-type float valve according to claim 1, characterized in that the valve rod penetrates one end of the valve shaft located outside the valve body, and is threadedly engaged with the valve rod through a nut to clamp the valve shaft and achieve positioning of the valve rod.
3. A wafer-type ball valve according to claim 2, characterized in that a step is provided at the position on the valve shaft connected to the valve body, a groove is provided at the position on the outer circumferential wall of the valve body corresponding to the step, and a gland is sleeved on the valve shaft, which is threadably connected to the groove and abuts against the step.
4. A wafer-type ball valve according to claim 3, characterized in that a sealing groove is provided on the side of the groove facing the butterfly plate, and a sealing ring sleeved on the valve shaft is arranged in the sealing groove.
5. A wafer-type ball valve according to claim 1, characterized in that an inner groove is provided on the side wall within the annular groove, and an elastic snap ring, which is used to press the convex edge and is compatible with the inner groove, is provided within the annular groove.
6. A wafer-type ball valve according to claim 5, characterized in that the bottom of the convex edge is provided with a plurality of protrusions arranged around the center of the filter screen, and the annular groove is provided with a limiting groove adapted to the protrusions.
7. A wafer-type float valve according to claim 6, characterized in that the protrusion is hemispherical. 8. A wafer-type float valve according to claim 7, characterized in that a clamping groove is provided at the junction of the protrusion and the protruding edge, and a clamping block adapted to the clamping groove is provided at the opening of the limiting groove.

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Product classification of Kaiweixi

KAI WEI XI CHAN PIN FEN LEI

PQ40F Manual Eccentric Semi-ball Valve

More Eccentric Semi-ball Valve>>

More ball valve>>

More valve>>

PQ40F Manual Eccentric Semi-ball Valve