PQ340F/Y hard seal eccentric hemisphere valve

Category: eccentric hemisphere valve
Product name: PQ340F/Y hard seal eccentric hemisphere valve
Product label: PQ340F/Y eccentric hemisphere valve, PQ340F side mounted eccentric hemisphere valve
Updated on: August 8, 2016 17:05:11
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Product Introduction

Product description:

PQ340F/Y hard sealing eccentric hemisphere valve uses eccentric valve body, eccentric ball and valve seat. When the valve stem rotates, it is automatically centered in the common track. The valve stem closes more tightly during the closing process, fully achieving good sealing performance. The ball of the valve is completely separated from the valve seat, which eliminates the wear of the sealing ring and overcomes the problem of constant wear between the traditional ball valve seat and the ball sealing surface. The non-metallic elastic material is embedded in the metal seat, and the metal surface of the valve seat is well protected. This product is especially suitable for steel industry, aluminum industry, fiber, small solid particles, pulp, coal ash, petroleum gas and other media.

Product features:

1. The internal valve seat is a movable valve seat, which has a certain wear compensation function and is easy to replace and disassemble.
2. It has a wide range of applications and can basically be used for various common pipeline media.
3. The valve body is cast in one piece, and there are few connection points, so there are few leakage points.

Executive standard:

Design and manufacture: GB/T12237-2007/GB/T26146-2010
Structure length: GB12221-2005
Supply requirements: GB/T12252-2005
Pressure test: GB/T13927-2008
Pressure test inspection: GB/T13927-1992

Material of main parts of the product:

PQ340F/Y hard seal eccentric hemisphere valve Part material

name	texture of material
valve body	QT450、WCB、ZG20CrMo、ZG1Cr18Ni9Ti
Valve spindle	2Cr13、1Cr13
Valve disc	Alloy nitrided steel, nitrided stainless steel, wear-resistant steel
valve seat	Alloy nitrided steel, nitrided stainless steel, wear-resistant steel
Bearing	Aluminum bronze, FZ-1 composite
filler	PTFE, flexible graphite

Product performance parameters:

PQ340F/Y Hard Seal Eccentric Hemispherical Valve Performance Parameters

Nominal pressure (Mpa)	zero point six	one	one point six	two point five	four
Nominal diameter (mm)	40-1600	40-1600	40-1200	40-600	40-600
Sealing test pressure (Mpa)	zero point six six	one point one	one point seven six	two point seven five	four point four
Shell test pressure (Mpa)	zero point nine	one point five	two point four	three point seven five	six
Applicable temperature (℃)	－29～300、－29～425、－29～540
Applicable media	Clear water, seawater, sewage, acid-base and other liquids, slurry, steam, gas, oil
Drive mode	Manual, electric, pneumatic
Connection type	Flange connection, wafer connection
Installation mode	Vertical installation, horizontal installation

Connection dimension of product outline structure:

PQ340F/Y hard seal eccentric hemisphere valve External structure connection dimension

Nominal pressure PN/MPa	Nominal diameter DN/mm	Dimension (mm)
Nominal pressure PN/MPa	Nominal diameter DN/mm	L	D	K	d	f	C	Z-￠d	H
one point six	forty	one hundred and sixty-five	one hundred and fifty	one hundred and ten	eighty-five	three	sixteen	4-￠18
	fifty	one hundred and seventy-eight	one hundred and sixty-five	one hundred and twenty-five	one hundred		sixteen
	sixty-five	one hundred and ninety	one hundred and eighty-five	one hundred and forty-five	one hundred and twenty		eighteen		two hundred and eighty
	eighty	two hundred and three	two hundred	one hundred and sixty	one hundred and thirty-five		twenty	8-￠18	three hundred and twenty
	one hundred	two hundred and twenty-nine	two hundred and twenty	one hundred and eighty	one hundred and fifty-five		twenty		three hundred and seventy
	one hundred and twenty-five	two hundred and fifty-four	two hundred and fifty	two hundred and ten	one hundred and eighty-five		twenty-two		four hundred and thirty
	one hundred and fifty	two hundred and sixty-seven	two hundred and eighty-five	two hundred and forty	two hundred and ten		twenty-four	8-￠23	five hundred and ten
	two hundred	two hundred and ninety-two	three hundred and forty	two hundred and ninety-five	two hundred and sixty-five		twenty-six	12￠-23	six hundred
	two hundred and fifty	three hundred and thirty	four hundred and five	three hundred and fifty-five	three hundred and twenty		thirty	12-￠26	six hundred and ninety
	three hundred	five hundred and two	four hundred and sixty	four hundred and ten	three hundred and seventy-five	four	thirty	12-￠26	seven hundred and sixty
	three hundred and fifty	five hundred and seventy-two	five hundred and twenty	four hundred and seventy	four hundred and thirty-five		thirty-four	16-￠26	eight hundred and thirty
	four hundred	six hundred and ten	five hundred and eighty	five hundred and twenty-five	four hundred and eighty-five		thirty-six	16-￠30	nine hundred and twenty-five
	four hundred and fifty	six hundred and sixty	six hundred and forty	five hundred and eighty-five	five hundred and forty-five		forty	20-￠30	one thousand and twenty-five
	five hundred	seven hundred	seven hundred and fifteen	six hundred and fifty	six hundred and eight		forty-four	20-￠34	one thousand one hundred and twenty
	six hundred	eight hundred and thirteen	eight hundred and forty	seven hundred and seventy	seven hundred and eighteen	five	forty-eight	20-￠36	one thousand two hundred and ten

Product structure dimension drawing:

Maintenance of pneumatic ball valve:

Preparations for pneumatic ball valve before installation:
1. Ensure that the installation position of the pneumatic pipeline ball valve is on the same axis, and the two flanges on the pipeline should be kept parallel. Confirm that the pipeline can bear the weight of the pneumatic pipeline ball valve itself. If it is found that the pipeline cannot bear the weight of the pneumatic pipeline ball valve, equip the pipeline with corresponding support before installation.
2. Confirm whether there are impurities, welding slag, etc. in the pipeline, and purge the pipeline.
3. Check the nameplate of the pneumatic pipeline ball valve, operate the pneumatic pipeline ball valve fully open and fully close for several times, confirm that the valve can work normally, and then check all details of the valve comprehensively to ensure that the valve is intact.
4. Remove the protective covers at both ends of the valve, check whether the inside of the valve body is clean, and clean the inner cavity of the valve body. Since the sealing surface of the pneumatic pipeline ball valve is spherical, even small sundries may cause damage to the sealing surface.

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Back to list Technical article of eccentric hemisphere valve

2021-08-05 What aspects should be considered when purchasing eccentric hemisphere valves, and how about the temperature resistance?

PQ340F/Y hard seal eccentric hemisphere valve

Product description:

Product features:

Executive standard:

Material of main parts of the product:

Product performance parameters:

Connection dimension of product outline structure:

Product structure dimension drawing:

Maintenance of pneumatic ball valve:

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