2″-1500LB-RTJ Piston Pneumatic Globe Valve

Technical Data Sheet

Product: Pneumatic Piston Globe Valve
Size / Rating: 2″ – Class 1500 – RTJ (Ring Type Joint)
Actuator Type: Pneumatic Piston Actuator

1. General Description

This high‑pressure pneumatic globe valve is driven by a piston‑type actuator, designed for Class 1500 service. The RTJ (Ring Type Joint) flanged ends ensure reliable sealing under extreme pressures using metal ring gaskets. The piston actuator delivers high output torque and fast response, making it ideal for remote automatic control or emergency shutdown applications in oil & gas, petrochemical, power generation, and refining industries.

2. Basic Specifications

3. Material Specification

4. RTJ Flange Sealing Features

4.1 Preferred Sealing for High Pressure

• RTJ sealing principle – Metal ring gasket is compressed into the flange groove, creating a metal‑to‑metal line contact seal. Ring materials include soft iron, 304/316 SS, or Inconel.
• High‑pressure capability – RTJ joints are specifically designed for Class 600 and above, maintaining reliable sealing under temperature fluctuations and pressure surges.
• Easy maintenance – Ring gaskets can be reused if undamaged and are simple to replace.

4.2 Ring Gasket Specifications

Ring type and material to be confirmed based on flange standard and service conditions.

5. Pneumatic Piston Actuator Specifications

5.1 Actuator Basic Parameters

5.2 Actuator Accessories (Optional)

5.3 Actuator to Valve Connection

• Mounting standard – ISO 5211 top flange (F10 / F12 / F14, etc., based on torque)
• Connection method – Bracket + coupling to ensure concentricity and reliable torque transmission

6. Key Features

6.1 High‑Pressure Globe Valve Characteristics

• Reliable high‑pressure sealing – Disc and seat are hardfaced with Stellite for high hardness, wear resistance, and erosion resistance under high differential pressure.
• Flow under the disc – Media enters below the disc, ensuring tight shut‑off as pressure assists sealing.
• Blowout‑proof stem – Stem design prevents ejection under pressure.

6.2 Pneumatic Actuator Advantages

• High output torque – Piston design provides greater torque than diaphragm actuators, suitable for high‑pressure valve operation.
• Fast response – Pneumatic actuation offers quick opening/closing for emergency shutdown and frequent cycling.
• Fail‑safe capability – Spring return actuators automatically return to a safe position (open or closed) upon air supply failure.

6.3 Overall Reliability

• Low emission – Packing meets ISO 15848 fugitive emission standards.
• Fire safe – Optional API 607 construction for flammable media.

7. Testing & Standards

8. Installation & Maintenance Notes

8.1 Installation Precautions

• Flow direction – Install according to the flow arrow on the body (flow under the disc).
• RTJ flange installation:
• Inspect flange grooves and ring gasket surfaces for scratches or debris before installation
• Ensure the ring gasket is properly seated in the groove
• Tighten bolts evenly in a cross pattern to the specified torque
• Air supply – Ensure clean, dry air supply; install an air filter regulator lubricator upstream.

8.2 Commissioning & Operation

• Initial status – Verify the valve is in a safe position before applying air pressure.
• Speed control – Adjust opening/closing speed with flow control valves if needed.
• Limit switch adjustment – Ensure position feedback signals correspond to fully open/fully closed positions.

8.3 Maintenance

• Regular inspection – Check air supply pressure, air line sealing, and actuator operation.
• Packing adjustment – If slight leakage occurs at the packing, carefully tighten the packing gland.
• Ring gasket replacement – When disassembling RTJ flanges, inspect the ring gasket for damage and replace if necessary.

9. Approximate Dimensions (for reference)

Note: Final dimensions are subject to the specific design; certified GA drawings should be referenced for engineering purposes.

Remarks:

1. This valve is designed for high‑pressure applications. Installation and commissioning should be performed by qualified personnel.
2. Actuator sizing should be based on actual valve torque, supply pressure, and fail‑safe requirements. Consult the engineering department for selection.
3. For explosion‑proof solenoid valves, limit switches, or other accessories, please specify the required hazardous area classification.

GUATANTEE:

SAVVY VALVES is committed to delivering exceptional product quality and worry-free after-sales service. Our valves are guaranteed to provide a minimum service life of 12 months, during which we will supply all necessary spare parts and detailed maintenance instructions free of charge. Within the warranty period, if any non-human-induced damage occurs, we will replace components at no cost and provide professional technical support. After the warranty expires, customers only need to pay for the cost of spare parts, while still benefiting from discounted maintenance services. Our goal is to help clients reduce operational costs and enhance production efficiency through reliable quality and comprehensive after-sales support. Whether for technical inquiries or maintenance needs, our expert team will respond promptly to ensure your valve system maintains optimal performance at all times.