Soft Seal Gate Valve

Short Description:

Gate valve is one of the most widely used valves in various fluid transportation projects. Traditional gate valves generally have phenomena such as easy fluid leakage and serious corrosion of internal parts. In the ordinary soft seal gate valves on the market, the stem shaft seal is easy to leak, and it is impossible to replace the sealing ring under continuous water and at any opening degree.

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Product Detail

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Product Description

The elastic seat seal gate valve adopts novel structural design, strict manufacturing technology and high-performance new materials, which overcomes the defects of the traditional gate valve, such as poor sealing, internal parts, especially the gate plate, easy to rust, rubber elastic fatigue and aging, reliable sealing performance, Light and quick operation, simple and convenient maintenance and long service life. Suitable for domestic water systems, water supply and drainage systems, sewage treatment systems, chemical fluid delivery systems, etc., used as a cut-off device on fluid lines in the construction, urban environmental protection, petrochemical, pharmaceutical, food, metallurgy, textile, power and other industries (not Suitable for throttling).

Features

The elastic seat seal gate valve, the main seal is a monolithic gate plate completely covered with rubber, which produces a small amount of adaptive elastic deformation under the action of operating force and water pressure, forming an excellent sealing effect with the precision cast valve seat.

◆ Nodular cast iron shell

The valve body and bonnet are made of ductile iron with high strength and corrosion resistance. The valve seat and valve body are integrally formed by precision casting without any processing.

◆ Full diameter flat bottom runner

When the valve is fully open, the gate completely leaves the flow path, and there is no groove at the bottom of the valve seat, which is not easy to accumulate debris. It is equivalent to a straight pipe and has the lowest flow resistance.

◆ All rubber covered gates

High-performance rubber wraps the skeleton completely, and cast iron is completely isolated from the medium without corrosion. The rubber is softly sealed and firmly knotted with the skeleton, and the whole is formed by hot vulcanization.

◆ Integral copper nut

The gate nut is integrally connected with the skeleton, and there is no movement empty stroke and loose phenomenon. Bronze material, self-lubricating with the valve stem, effectively reduce the operating torque.

◆ Guide rail system

There is a rail system between the valve body and the gate. The bearing water pressure is not offset when the gate is sealed, and the rubber is not contacted and worn when lifting to prevent the valve stem from bending.

◆ Stainless steel stem

Corrosion-resistant stainless steel stem, trapezoidal thread rolling processing, smooth thread wear resistance, effectively reduce operating torque and increase service life.

◆ Double thrust bearing (dark rod type DN≤300)

The stem has double thrust bearings at the neck, and the inverted stem avoids water pressure. Bronze material, self-lubricating with the valve stem, effectively reduce the operating torque.

◆ Valve stem axial seal (dark rod type)

Three O-ring seals, axial self-sealing under the effect of water pressure, without the trouble of packing seal adjustment. The top dust ring prevents external impurities from entering the shaft seal.

◆ Inverted seal structure (dark rod type DN≤300)

The patented inverted seal structure allows the valve to replace the O-ring seal at the gland in emergency situations where water is constantly flowing and at any angular opening.

◆ Medium flange connection

High-strength internal cavity angle screws, hot melt adhesive and valve cover rubber ring are closed, completely isolating the screws from the working medium and the external environment.

◆ Double feet and double rings

For gate valves of all specifications, the valve body is integrally cast with two legs, and the valve cover is integrally cast with two lifting rings, which is convenient for handling and storage.

◆ Non-toxic anti-corrosion coating

The inner and outer surfaces of the valve are electrostatically coated with non-toxic epoxy resin powder, which is corrosion-resistant and long-life, and can be directly used in drinking water, food and pharmaceutical industries.

◆ Diversified operation

The structure has dark rod type and bright rod type. It can be operated by handwheel, T-handle, electric, pneumatic and other devices. The valve position on-site indication, valve position signal output, code lock control, extended operating rod, direct buried device are available.

◆ Convenient installation and construction

With flange, clamp groove, socket, socket, mechanical joint, PE joint and other connection methods, optional telescopic function, convenient connection with cast iron, steel, plastic and other pipelines.

Executive Standard
1. Valve design and manufacturing according to GB / 24924-2010 standards;
2. The length of the valve structure according to the provisions of GB / T12221-2005;
3. Inspection and testing should be consistent with the relevant provisions of GB / T13927-2008;
4. Flange size according to the provisions of GB / T17241.6-2008;

Technical Parameters

Nominal size	DN40~DN800
Suitable media	Clear water, or similar physical and chemical properties of water medium (Sewage, raw water, hot water, oil medium, please specify)
Operating temperature℃	0-70 (standard configuration) 0-100 (hot water configuration)
Nominal pressure	PN10	PN16	PN25
Work pressure（MPa)	≤1.00	≤1.60	≤2.50
Strength test（MPa)	1.50	2.40	3.75
Seal test（MPa)	1.10	1.76	2.75
Low pressure test（MPa)	0.02	0.02	0.02

Main material

Serial number	name	material
1	Body	QT450
2	Valve plate	QT450+NBR
3	Stem nut	QT450
4	Valve stem	20Cr13
5	Flange seals	NBR
6	cap	QT450
7	O-ring	NBR
8	O-ring	NBR
9	Countersunk head bolt	35#
10	Dust cover	NBR
11	Round head screw	35#
12	Handwheel	QT450
13	Gland	QT450
14	Countersunk head bolt	35#

The main shape and connection dimensions

Nominal diameter	The main dimensions and connection dimensions
Nominal diameter	L	D	D1	D2	C	F	Z-d	H
Z45X-10Q
40	165	150	110	84	19	3	4-Φ19	240
50	178	165	125	99	19	3	4-Φ19	240
65	190	185	145	118	19	3	4-Φ19	260
80	203	200	160	132	19	3	8-Φ19	275
100	229	220	180	156	19	3	8-Φ19	380
125	254	250	210	184	19	3	8-Φ19	410
150	267	285	240	221	19	3	8-Φ23	435
200	292	340	295	266	20	3	8-Φ23	630
250	330	395	350	319	22	3	12-Φ23	645
300	356	445	400	370	24.5	4	12-Φ23	697
350	381	505	460	429	24.5	4	16-Φ23	802
400	406	565	515	480	24.5	4	16-Φ28	842
450	432	615	565	530	25.5	4	20-Φ28	1060
500	457	670	620	582	26.5	4	20-Φ28	1170
600	508	780	725	682	30	5	20-Φ31	1300
700	610	895	840	794	32.5	5	24-Φ31	1550
800	660	1015	950	901	35	5	24-Φ34	1750
900	711	1115	1050	1001	37.5	5	28-Φ34	1950
1000	811	1230	1160	1112	40	5	28-Φ37	2170
Z45X-16Q
40	165	150	110	84	19	3	4-Φ19	240
50	178	165	125	99	19	3	4-Φ19	240
65	190	185	145	118	19	3	4-Φ19	260
80	203	200	160	132	19	3	8-Φ19	275
100	229	220	180	156	19	3	8-Φ19	380
125	254	250	210	184	19	3	8-Φ19	410
150	267	285	240	221	19	3	8-Φ23	435
200	292	340	295	266	20	3	12-Φ23	630
250	330	405	355	319	22	3	12-Φ28	645
300	356	460	410	370	24.5	4	12-Φ28	697
350	381	520	470	429	26.5	4	16-Φ28	802
400	406	580	525	480	28	4	16-Φ31	842
450	432	640	585	548	30	4	20-Φ31	1060
500	457	715	650	609	31.5	4	20-Φ34	1170
600	508	840	770	720	36	5	20-Φ37	1300
700	610	910	840	794	39.5	5	24-Φ37	1550
800	660	1025	950	901	43	5	24-Φ40	1750
900	711	1125	1050	1001	46.5	5	28-Φ40	1950
1000	811	1255	1170	1112	50	5	28-Φ43	2170