What types of industrial valves does Tianjin Top Valve manufacture?

We manufacture resilient-seated butterfly valves (wafer, lug, double-flanged and grooved-end), check valves (dual plate, wafer lift, silent and ball type), resilient seat gate valves (rising stem, non-rising stem, buried and DIN pattern), globe valves for water, ammonia, vacuum and power-station service, as well as ball valves and eccentric plug valves.

Are your butterfly valves approved for drinking water?

Selected models, including 4020G, 4020L, 4325G and 4325L, are WRAS approved for potable water applications. Request our catalog to receive the approval reference and material declaration for each model.

Do you produce your own rubber seats and castings?

Yes. Our group operates Tianjin Dongfang Rubber Factory (since 1987) and Tianjin Donglian Valve Factory (since 1996), with an independent foundry, rubber compounding and moulding, a CNC machining center, assembly lines and a physical and chemical laboratory. This lets us control elastomer quality and casting integrity in-house.

Which quality and management certifications do you hold?

Our management system meets ISO 9001 quality management, ISO 14001 environmental management and ISO 45001 occupational health and safety standards, together with EU (CE) conformity for applicable products.

Can you supply valves to international flange and dimension standards?

Depending on the model, valves can be supplied with flange drilling to EN 1092 PN10/PN16, ASME/ANSI Class 125/150, BS and JIS, and our German-standard gate valves follow DIN face-to-face dimensions. Always confirm the exact standard on the model datasheet before ordering.

How can I get datasheets, drawings and a product catalog?

Request a catalog online or email victor@dytopvalve.com with your size, pressure rating, media and connection type. Our engineering team replies within 24 hours with datasheets, dimensional drawings and material specifications.

Where is your factory located and how are orders shipped?

Our factory is in the Wuxia Industrial Park, Dongli District, Tianjin, China, with fast road access to Tianjin Port. We export to customers in more than 50 countries using protective packaging and sea, air or rail freight.

High-Quality High - Temperature - Vacuum Isolation Globe Valve for Vacuum Heat Suppliers, Factory

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High-Quality High - Temperature - Vacuum Isolation Globe Valve for Vacuum Heat Suppliers, Factory

The vacuum valves produced by our company include low vacuum, medium vacuum and high vacuum. According to different media and vacuum conditions, different structural forms and sealing methods are selected to ensure the vacuum degree of the valve. They are especially suitable for steam turbine condensation and vacuum negative pressure systems in thermal power plants, medicine, papermaking, etc., and play a vacuum isolation and sealing role.

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Product Description

Product Usage and Features

Structural Form: The vacuum isolating gate valve features a stuffing box vacuum sealing device and a parallel double gate rising stem structure. The vacuum isolating stop valve is configured with a stuffing box vacuum sealing device and a straight lifting structure.
Drive Mode: Supports manual, electric, and gear drive mechanisms.
Connection Method: Available in socket welding, flange connection, and butt welding.
Floating Sealing Mechanism: Formed by the gate, guide frame, and spring, allowing the sealing surface to achieve self-compensation after friction.
Synchronized Operation: The guide frame and valve body guide movement ensure that both gates open simultaneously.
Vacuum Isolation Stop Valve: The valve stem and disc are dynamically connected; the disc and seat are vertically sealed, offering a short opening/closing stroke and reduced valve height.
High-Efficiency Vacuum Sealing: The stuffing box integrates high-strength flexible graphite nickel wire expansion packing, alloy nickel wire mesh-coated improved metal PTFE packing, and a grease seal ring. High-vacuum sealing silicone grease is injected between the packing and seal ring to eliminate valve stem leakage and provide superior isolation from the atmosphere.

Product Performance Specification

Nominal Pressure	Shell Pressure	Seal Pressure	Applicable Media	Applicable Temperature
1.0 / 1.6 / 2.5 / 4.0 / 6.4 / 10.0 / 16.0 MPa	PN × 1.5 times	PN × 1.1 times	Water, steam, air	≤425℃ ≤550℃

Main Component Material

Component Name	Valve Body, Valve Cover	Valve Stem	Valve Disc	Seal Surface	Stem Nut	Filler	Fastener
DKJ61H-C type	25 or WCB	2Cr13	25	H: Cr13 Stainless steel	Aluminum Bronze	Expanded Graphite	High quality carbon steel
DKJ61Y-I type	Chrome-molybdenum steel	25Cr2Mo1VA	12Cr1Mo1VA	Y: Cemented Carbide	Aluminum Bronze	Expanded Graphite	Chrome aluminum steel

Packaging & Delivery

Frequently Asked Questions (FAQ)

What types of connection methods are supported?

The valves support three standard piping connection methods: socket welding, flange connection, and butt welding, adapting to different system specifications.

What working media are suitable for these vacuum valves?

These valves are engineered to handle water, steam, and air within operating temperatures up to 425℃ or 550℃ depending on the material configuration.

How does the floating sealing mechanism maintain reliable sealing?

The floating sealing assembly consists of the gate, guide frame, and internal spring, allowing the sealing surface to self-compensate and maintain a tight seal despite wear from friction.

What drives the vacuum isolating gate and stop valves?

The valves support manual handwheel operation, electric actuation, and mechanical gear drive systems to fit varying operational conditions.

What ensures complete vacuum isolation from the atmosphere?

The stuffing box combines flexible graphite nickel wire expansion packing, metal PTFE packing, and grease seal rings with injected high-vacuum silicone grease to create a hermetic seal against atmospheric leakage.

High-Quality High - Temperature - Vacuum Isolation Globe Valve for Vacuum Heat Suppliers, Factory

Product Description

Product Usage and Features

Product Performance Specification

Main Component Material

Packaging & Delivery

Frequently Asked Questions (FAQ)

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