Description

Technical Parameters

Introduction

Expanding Gate Valve is a full-bore shut-off valve for pipeline media isolation, available for bulk ordering or custom-made to suit specific operating conditions.

Parameter

Item	Description
Model	PDB200 / OEM
Valve Type	Expanding Gate Valve
Bore	Full Bore
Flanged End Standard	ASME B16.5 (≤ 24")ASME B16.47 Series A (≥ 26")
Butt Weld End Standard	ASME B16.25
Isolation Feature	DBB (Double Block and Bleed)DIB (Double Isolation and Bleed)
Design Standard	API 6D, ASME B16.34
Face-to-Face	ASME B16.10, API 6D
Testing & Inspection	API 6D
Fire Safe Standard	API 6FA or API 607
Fugitive Emission	ISO 15848-2
Type Test	ISO 15848-1
NACE Compliance	Manufacturing in accordance with latest NACE standard available upon request
CSA Compliance	CSA Z245.15 (latest edition available upon request)
Remarks	Other sizes and pressure ratings are available upon request

Features of Expanding Gate Valve

DBB/DIB Isolation Capability

The Expanding Gate Valve provides dual shut-off and pressure relief, simultaneously isolating upstream and downstream pressures, making it suitable for critical pipeline maintenance.

High Wear-Resistant Sealing Structure

The valve seat and gate can be selected from metal-to-metal or R-PTFE/PEEK inserts, providing stable operation for 8–10 years under high-pressure opening and closing conditions.

Full-Bore Pigging Capability

The Expanding Gate Valve features a full-bore design, allowing pigs to pass smoothly, suitable for long-distance pipelines requiring regular pigging.

Customization

Item	Description
Size & Pressure Rating	Customizable in sizes from 2" to 48" and pressure classes from Class 150 to Class 2500
Body & Trim Materials	Carbon steel, stainless steel, or duplex stainless steel available based on media requirements
Sealing Type	R-PTFE, Nylon, PEEK, or metal-to-metal sealing options
End Connection	Flanged or butt weld ends in accordance with ASME standards
Operation Type	Manual operation or electric operation

FAQ

Q: How does an Expanding Gate Valve work?

A: An Expanding Gate Valve expands laterally during its closing stroke, simultaneously pressing the gate against both valve seats to form a seal.

Q: Does it support bidirectional flow?

A: Yes. The Expanding Gate Valve features a bidirectional sealing structure, maintaining consistent closing performance in both flow directions.

Q: Is it suitable for pipeline pigging operations?

A: Yes. The Expanding Gate Valve uses a full-bore design, allowing pigs to pass through smoothly without damaging the internal structure.

Q: Is it suitable for long-term installation?

A: Yes. The Expanding Gate Valve is designed for fixed pipelines, maintaining a long-term seal.

Hot Tags: expanding gate valve, China expanding gate valve manufacturers, suppliers, factory