Stainless Steel Internal Thread Ball Valves

Typical Application Scenarios

With 1000 WOG high-pressure rating, corrosion-resistant stainless steel construction and convenient threaded connection, Stainless Steel Internal Thread Ball Valves fit high-pressure piping systems in various industries without complicated installation, and precisely meet various fluid control requirements. Typical applications are as follows:

● Petrochemical Industry: Used in pipelines for crude oil, refined oil, chemical solvents, corrosive gas and other media. Suitable for 1000 WOG high-pressure conditions. 316/316L material effectively resists corrosion and ensures stable operation.

● Municipal Gas Industry: Used in high-pressure gas transmission and distribution pipelines for natural gas and LPG. Excellent sealing prevents gas leakage. 1000 WOG rating perfectly matches high-pressure gas systems.

● Industrial Manufacturing: Applied in hydraulic systems, lubrication systems and compressed air systems. Fast operation and smooth control for industrial equipment.

● Food & Pharmaceutical Industry: Used for corrosive cleaning media, high-temperature steam and hygienic fluid control. 316L stainless steel meets hygienic standards with no contamination risk.

● HVAC & Energy Industry: Suitable for high-temperature hot water, steam and heat-conducting oil. Metal seat versions ensure stable performance under high-temperature 1000 WOG conditions.

Material Selection Guide

Material selection directly determines service life and applicability.

304 Stainless Steel (06Cr19Ni10): For general water, oil, gas (tap water, hydraulic oil, compressed air, natural gas). Temperature: -20°C~180°C. Cost-effective for most standard applications.

316 Stainless Steel (06Cr17Ni12Mo2): For mildly corrosive media (chlorinated water, weak acid/alkali, sour crude oil). Temperature: -20°C~260°C. Better pitting and crevice corrosion resistance than 304.

316L Stainless Steel (022Cr17Ni12Mo2): For strong corrosive media (strong acid, alkali, chloride gas). Temperature: -40°C~260°C. Ultra-low carbon avoids intergranular corrosion, ideal for severe corrosive environments.

Seat Matching:

oPTFE: Excellent sealing, for normal temperature, low abrasion 1000 WOG service.

oPPL: For medium-high temperature up to 260°C, better heat resistance than PTFE.

oMetal Hard Seal: For high temperature up to 450°C, high abrasion and fluctuating pressure conditions.

Core Definition

Stainless Steel Internal Thread Ball Valves are high-precision fluid control valve made of stainless steel with female threaded ends and 1000 WOG pressure rating.

1000 WOG is a standard industrial rating meaning the valve is suitable for Water, Oil, Gas at 1000 psi (≈6.9 MPa).

Available in one-piece or 3-piece body (3-piece is most popular for easy in-line maintenance). The valve opens and closes quickly by 90° rotation of the ball. Threaded ends (NPT/BSPT/G) allow easy installation without welding.

Made of 304/316/316L stainless steel, it is widely used in petrochemical, industrial, gas, food, pharmaceutical and HVAC systems.

Key Features & Core Parameters

Key Features

● High Pressure Rating: Full compliance with 1000 WOG (6.9 MPa), safe for high-pressure water, oil and gas.

● Easy Installation & Maintenance: 3-piece design allows in-line service; threaded connection requires no welding.

● Corrosion Resistant: 304/316/316L stainless steel body, ball and stem for long service life.

● Reliable Sealing: ANSI Class VI soft seal, ANSI Class IV metal seal, zero leakage.

● Flexible Operation: Manual, electric or pneumatic actuation available.

● Wide Temperature Range: -40°C ~ 450°C depending on seat material.

● Precise Flow Control: Low flow resistance, fast on-off and accurate throttling.

Core Parameters Table

Detailed Explanation of 1000 WOG

● W (Water): Suitable for clean water, circulating water, tap water, slightly corrosive wastewater.

● O (Oil): Suitable for mineral oil, hydraulic oil, lubrication oil, diesel, gasoline, heavy oil.

● G (Gas): Suitable for natural gas, LPG, compressed air, inert gas, general corrosive gas.

● 1000: Rated working pressure 1000 psi (≈6.9 MPa).

Shell Test Pressure: 1500 psi (1.5 × rated)

Seal Test Pressure: 1100 psi (1.1 × rated)

Core Points for Installation & Maintenance

Installation Points

1.Verify pressure class, size, thread, material and medium compatibility.

2.Clean threads and valve cavity before installation.

3.Use PTFE tape or thread sealant; tighten properly to avoid damage.

4.Perform pressure test for at least 30 minutes before commissioning.

5.Reserve operation and maintenance space; install protection for outdoor use.

Maintenance Points

1.Regular inspection for leakage, corrosion and operation performance.

2.Clean and protect exterior surfaces against corrosion.

3.Replace seats and seals when worn or leaking.

4.For actuated valves: check motor, air supply, limit switches and lubrication regularly.

5.Do NOT repair under pressure. Record maintenance history for traceability.

Product Advantage

Stainless Steel Internal Thread Ball Valves are designed for medium-high pressure fluid control. Featuring 1000 WOG rating, corrosion-resistant stainless steel, convenient threaded installation and user-friendly 3-piece structure, they are manufactured in accordance with API 608 and ASME standards.

The valves provide reliable sealing, flexible operation and long service life, widely used in petrochemical, gas, industrial, food and HVAC fields. They simplify piping layout, reduce installation and maintenance costs, and serve as a reliable solution for small-bore high-pressure fluid systems.