Product Overview

Our Carbon Steel Valve Seat are precision-made using investment casting technology, which can produce complex structures and high-precision products. At the same time, we have CNC machining centers to meet your high-precision machining needs. A variety of carbon steel materials are available for you to choose from, which can achieve small batches and multiple varieties of customization. Including:HPHT Valve Seat/Sulfide Resistant/TrimZero Leakage, provide one-stop solution for high pressure and long life of petroleum/chemical/power station valves.

Advantages

Advantages	Technical Support	Customer Value
Smooth sealing surface	CNC precision turning, sealing surface Ra ≤ 0.4μm (better than the API 6A requirement of 0.8μm)	Achieve Class VI zero leakage, eliminating secondary grinding;
High-pressure deformation resistance	Quenching and tempering heat treatment (QT850) + surface nitriding, hardness gradient HV550 → HV1000	Withstand 2500 psi with permanent deformation less than 0.02 mm;
Complex flow path integrated molding	Silica sol casting achieves net-shape multi-stage pressure relief cavities/oblique holes, reducing flow resistance by 40% (CFD verified)	Increase flow by 15%, reduce cavitation damage;
Corrosion-resistant customization	Options based on media: Hard chrome plating for steam valves / Inconel 625 spray-welded for acid valves	Extend service life by three times, adaptable to extreme operating conditions;

Key Features

1. Small batches and multiple varieties

2. High precision±0.01mm

3. Multiple materials available

4. 20+ years of casting experience

5. Efficient quality inspection system

6. Multiple machining center equipment, multiple machine tools

Technical Specifications

Parameter	Details
Material	1025,1035,1045,WCB, 1.0619,42CrMo, 4140, 4340, 8620, S45C,C35, C45,Q235
Size Range	Max.1200800400mm
Surface Finish	Ra 1.6-3.2μm
Standards	ISO 9001, ASTM A351, ASME B16.34, API 610
Heat Treatment	Solid Solusion Treatment/Quenching and Tempering/Carburization

Applications:

Oil Wellhead Valves: Integrally hardened valve seats (HRC60), API 6A PR2-grade tested.

Power Plant Main Steam Valves: Internal electrolytic polishing (Ra 0.8μm), resistant to microparticle erosion.

LNG Cryogenic Valves: -196°C cryogenic treatment, impact toughness ≥100J.

Why Choose Our Valve Seats?

Casting: 3-layer silica sol shell, control valve seat profile ≤ CT4

Heat Treatment: Cryogenic treatment to eliminate internal stress

Machining: Four-axis machining center, positioning accuracy ±0.003mm

Surface Treatment: In-house spray painting center (HVOF/LPPS)

Testing: 3D sealing surface profile scanning (Taylor Hobson); 2000 bar high-pressure airtightness test bench: intergranular corrosion test (ASTM G48)

Production Capabilities

Facility: 66700㎡ Industry 4.0 foundry with CNC machining center and heat treatment workshop.

Lead Time: 30-45 days (in general,), lost wax molds in 15 days.

Certifications: ISO 9001:2015(by DNV) for quality management.

FAQ

Q: 1.What products do you produce?

A: We are specialized in producing precision castings with silica sol shell mould made in the field of stainless steel, carbon steel, alloy steel, tool steel, corrosion resistant steel, heat resistant steel, special high alloy steel and part of copper & alumium materials.

Q: 2.Do you provide samples? Is it free?

A: Yes, we could offer the samples, but it not for free, the samples cost and freight will be for client's side.

Q: 3.Could I use my own logo or design on goods?

A: Yes. Customized logo and design on production are available.

Q: 4.How long is your delivery time?

A: Generally it is 5-10 days if the goods are in stock. Normal producing time 4-6 weeks if the goods are not in stock and need to open new mould. The delivery time is according to quantity.

Q: 5.What is your terms of payment?

A: If the amount is not over Usd1000, payment 100% in advance, If amount is over Usd1000, will be negotiated the advanced payment.

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