API 6D Valves

API 6D Conduit Gate Valve

An API 6D conduit gate valve is a type of valve that adheres to the American Petroleum Institute's standard 6D. It's a widely used and crucial component in pipeline systems across various industries due to its versatility and reliable performance.

Size Range

2 – 80 NPS, DN50 - DN2200

Body Materials

Carbon Steels, Low Temperature Carbon Steel, Martensitic Steels, Austenitic Stainless Steel, Duplex Stainless Steels, Super Duplex Stainless Steels, Nickel Alloys, Nickel Aluminum Bronze, Hastelloy, Inconel, Titanium Alloy & Carbon Steel with Internal Corrosion Resistant Alloy (CRA) Overlay

Temperature Range

-29°C to 1150°C

Trim Materials

Maximum Allowable Operating Pressure

ASME 150# to 2500#

Pressure-Temprature Rating

ASME B 16.34

Construction Details

Bolted Bonnet

Body Style

Flanged End, Butt Weld

Design Standard

API 6D

Flange Drilling

ASME B16.5

Testing Standard

API 598, API 6D, ISO 5208, API6FA, ISO 10497,BS6364

Face To Face

ASME B16.10

Applications

Refineries,Hydrocarbon,Energy and Process industries.

Operation

Handwheel, Gear, Actuator (Pneumatic, Hydraulic, Electro-Hydraulic and Electric Motorised)

Features:

- Full Bore Design: The valve features a full bore passage, meaning the internal diameter of the valve matches the pipeline diameter. This allows for unrestricted flow with minimal pressure drop, ideal for applications requiring high flow rates.
- Bi-Directional Flow: API 6D conduit gate valves can be used for flow in either direction, offering operational flexibility.
- Double Block and Bleed (Optional): Some models incorporate a double block and bleed feature, enabling isolation of the flow path for maintenance or safety purposes while allowing pressure release between the blocked sections.
- Slab Gate: The valve utilizes a solid slab gate that slides vertically to open and close the flow path. This design ensures positive shutoff and reliable sealing.
- Durable Materials: Constructed from robust materials like cast iron or forged steel to withstand high pressures and harsh operating environments.

Benefits:

- Low Pressure Drop: The full bore design minimizes flow restriction, leading to lower pressure drop and improved efficiency in pipeline systems.
- Versatility: Suitable for bi-directional flow and various applications due to its robust design and reliable sealing.
- Positive Shutoff: The slab gate design provides secure closure, ensuring complete isolation of the flow path when required.
- Durability: High-quality materials and robust construction guarantee extended service life and reliable performance under demanding conditions.
- Industry Standard Compliance: Meeting API 6D standards ensures quality, safety, and compatibility with other equipment adhering to this standard.

FAQs:

A. What are the advantages of a full bore design?

- - Minimizes pressure drop, improving flow efficiency and reducing energy consumption.
  - Allows for pigging operations (using cleaning and inspection tools) in pipelines.

B. What is the double block and bleed feature?

This feature incorporates two gate closures and a bleed connection. It allows for isolating a section of the pipeline for maintenance while safely releasing any trapped pressure.

C. How do API 6D conduit gate valves differ from other gate valves?

- API 6D certification ensures the valve meets specific requirements for pressure handling, fire resistance, material properties, and dimensional standards, making it suitable for critical applications.

D. What are the maintenance requirements for API 6D conduit gate valves?

Regular inspection is recommended to ensure proper operation and identify potential issues like wear or leakage. The specific maintenance schedule will depend on the operating conditions and manufacturer’s recommendations.