2PC Stainless Steel Internal Thread Ball Valves

Core Technical Parameters

2PC Stainless Steel Internal Thread Ball Valves are designed and manufactured in strict accordance with national standards, with parameters covering all scenarios from low to medium pressure. They can directly match the requirements of national standard internal threaded pipe systems. All parameters have undergone rigorous testing to ensure stability and reliability, as detailed in the table below:

Core Product Advantages

● GB-compliant & compatible: Fully meets GB standards, directly matches national threaded pipelines, no extra adaptation needed.

● Easy disassembly & maintenance: 2-piece bolted body, simple to overhaul without special tools.

● Reliable sealing & low leakage: ANSI Class VI soft seal / Class IV hard seal; dual sealing prevents leakage.

● Premium materials for harsh conditions: 304/316/316L/2205 duplex stainless steel for high corrosion & temperature resistance.

● Flexible operation & high flow efficiency: 90° quick on-off, low flow resistance; manual / electric / pneumatic options available.

Product Definition & Working Principle

2PC Stainless Steel Internal Thread Ball Valves are GB-standard fluid control valves with a 2-piece bolted body, female threaded ends, and rotating ball structure.

Working Principle:Actuator rotates the stem and ball 0°–90°:

● 0°: full open, maximum flow

● 90°: full closed, tight shut-off

● Intermediate angles: precise throttling

Widely used in low-to-medium pressure, small-bore GB pipelines in petrochemical, municipal, food, pharmaceutical and other industries.

Stainless Steel Material Selection Guide

● The core component material of 2PC Stainless Steel Internal Thread Ball Valves directly determines their applicable operating conditions and service life. Accurate selection is required based on media corrosivity, temperature, pressure, and national standards. The specific materials and applicable scenarios are shown in the table below, helping you quickly select the right material and avoid selection errors:

Design & Manufacturing Standards

● Dimensional: GB/T 12224, GB/T 12253, GB/T 7306

● Material: GB/T 24511, GB/T 12459, GB/T 2100

● Testing: GB/T 13927, GB/T 4334, GB/T 26480

● Surface: GB/T 1031, GB/T 15820

● Actuation: GB/T 12222

Quick Selection Guide

When selecting valves, it is essential to strictly match the national standard parameters for internally threaded pipelines, media characteristics, and operating conditions. Considering the structural and performance characteristics of 2PC Stainless Steel Internal Thread Ball Valves, the following key points should be followed during selection to ensure perfect compatibility between the valves and pipelines and minimize usage risks:

1.Confirm GB standard, DN, PN and thread type (G/BSPT/NPT).

2.Choose material: 304 (general) → 316 (mild corrosion) → 304L/316L (low carbon / corrosion) → 2205 (high pressure / severe corrosion).

3.Match pressure and temperature: select seat (PTFE / PPL / metal) accordingly.

4.Selection: soft seal (hygiene / flammable)；hard seal (high temperature / particles).

5.Operation: manual (simple)；electric / pneumatic (automation / remote).

Installation & Maintenance

Installation

1.Inspect model, material, pressure and thread before installation.

2.Clean threads and valve cavity; use PTFE tape or sealant.

3.Follow flow arrow; reserve operation and maintenance space.

4.Reassemble evenly crosswise; pressure test per GB/T 13927.

5.Install compensators for extreme temperatures; cover for outdoor use.

Maintenance

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

2.Clean exterior; apply anti-corrosion oil on non-sealing surfaces.

3.Replace seats, gaskets and packing if leakage occurs.

4.Maintain electric/pneumatic actuators, check limits and feedback.

5.Spare valves: store dry, half-open, sealed with plugs.

Troubleshooting

● Leakage: retighten, replace gaskets / seats / valve.

● Stuck operation: clean cavity, replace worn parts.

● Poor sealing: replace seats, refinish ball, re-torque bolts.

● Actuator fault: check power, air supply, motor, solenoid.

● Keep complete maintenance records.

Typical Application Scenarios

● Petrochemical: crude oil, refined products, chemical solvents, corrosive media.

● Municipal Water Supply: tap water, wastewater, small-bore distribution lines.

● Food & Pharmaceutical: hygienic pipelines, 316L + PTFE, zero leakage.

● Power & HVAC: power plant auxiliaries, heating and cooling systems.

● Machinery & Marine: hydraulic systems, cryogenic, deep-sea equipment (2205).