I. Product Overview

Our company manufactures Plug Valves with a Product Specification Level (PSL) of PSL3 and a Performance Requirement Level (PRL) of PR2. These valves are fully interchangeable with comparable products from companies like SPM, and are widely used in cementing and fracturing equipment.

1. The High-Pressure Plug Valve is a critical component for connecting high-pressure manifolds during cementing, well completion, and fracturing operations, and is also suitable for controlling other high-pressure fluids. The main components of the plug valve include the valve body, sealing segments (or arc pieces), and the plug.

2. All Low-Torque High-Pressure Plug Valves designed and manufactured by our company are forged from high-quality, high-strength alloy structural steel. Strict heat treatment ensures uniform and consistent metallurgical structure and pressure bearing capacity. The materials used fully comply with US ASTM and AISI standards, and the product's technical specifications completely meet the API Spec 6A standard. The end connections can be designed with line pipe threads, tubing threads, butt-weld ends, or non-pressure seal ends.

3. High-Pressure Plug Valve end connections are available in three main types: Hammer Union (Wing Union) Plug Valves, LP internal thread connections, and TBG external thread connections. We can also design high-pressure plug valves with a base upon customer request.

4. High-Pressure Plug Valve sizes include 1", 2", and 3". Cold Working Pressure (CWP) ratings are available in four grades: 42 MPa (6,000 Psi), 70 MPa (10,000 Psi), 105 MPa (15,000 Psi), and 140 MPa (20,000 Psi). We can provide plug valves and repair kits for use in normal temperature, low temperature, and sour gas (H₂S-containing) service conditions.

II. Design Features

The plug valve consists of parts such as the valve body, plug, and sealing segments. The working principle is: flow is controlled by adjusting the position of the plug via the handwheel. Sealing between the valve body and the plug is achieved by the sealing segments. Due to the high precision of the sealing segments and the use of a special grinding process, the product ensures no leakage under high working pressure conditions.

1. Stable Pressure Bearing: Equipped with a replaceable resilient Nitrile rubber sealing ring (O-ring) and a robust, thick-walled design, sufficient to withstand pressure on high-pressure pipelines.

2. Easy Interchangeability: The end connections use union heads or can be connected with internal and external threads (LP, TBG). They feature full imperial sizing and are fully interchangeable with foreign products.

3. Simple Maintenance: The plug valve's maintenance and upkeep do not require removal from the pipeline, and no special tools are needed for disassembly.

4. Excellent Sealing and Corrosion Resistance: The finely machined plug undergoes a special coating process, resulting in excellent sealing performance and anti-corrosion effects.

5. Visible Valve Position: The plug cap is clearly marked to indicate the valve's fully open or closed position. A locking spring restrains the valve in the desired position.

III. Main Technical Parameters of High-Pressure Plug Valves

1. Hammer Union Connection Plug Valve

Working Pressure:42 MPa ∼ 140 MPa (6,000Psi∼20,000Psi) Nominal Bore:1″∼ 3″ (DN25∼DN80) Temperature Rating:−29 ℃∼121℃ (PU Class) −46℃∼121℃ (PL Class) Applicable Service:Standard, Low-Temperature, and H2S Service

2、Threaded End Plug Valve

Working Pressure:42 MPa～105 MPa Nominal Bore (Size):1″～3″ Temperature Rating:-29 ℃～121 ℃ (PL Class) Manufacturing Standard:API 6A Applicable Service:Standard

3、Sectional Drawing of SF105-F×M-2"×2"-fig 1502 Hammer Union Plug Valve:

Parts List for a High-Pressure Fig Plug Valve with Hammer Union (F×M) End Connections

4.High-Pressure Plug Valve Repair Kit (Our repair kits are interchangeable with SPM products of the same specification.)
4.1、140 MPa Plug Valve Repair Kit Parts List

4.2、Plug Valve Repair Kit Parts List for 105 MPa, 70 MPa, and 42 MPa

IV. Operating Instructions

1. The operator should select the appropriate temperature rating by considering the temperature the equipment will experience during drilling and/or production operations.

2. All plug valves are subjected to strict hydrostatic pressure tests and non-destructive testing (NDT) before leaving the factory. After disassembly or repair, a hydrostatic pressure test must be performed. The test pressure shall be the rated working pressure, held for 10 minutes, with no visible leakage (Note: All air must be bled from the system before testing).

3. When installing the plug valve, the operator should wear protective eyewear to prevent small flying debris from injuring the eyes during the installation process.

V. Warnings

1. Do not use the valve under conditions exceeding the rated working pressure.

2. The plug valve is designed to operate within a temperature range of −46 ℃ to 121 ℃. Immediately stop using the valve if the ambient temperature drops below −46 ℃ or if the contacted fluid temperature exceeds 121 ℃.

3. Do not disassemble the plug valve while the system is under working pressure.

4. When tightening the hammer union, ensure the hammer force or tightening torque applied does not cause deformation or damage to the nut.

VI. Malfunctions, Causes, and Solutions

VII. Repair and Maintenance

1. Clean all disassembled parts to ensure they are free of debris, oil stains, and rust. After cleaning, inspect the metal components for scoring or marks and the non-metal components for deformation or failure. If marks are found on metal parts, gently file them off using a fine-toothed set of files, then polish with metallographic sandpaper, and wipe clean. If non-metal parts are found to be deformed or failed, they must be replaced immediately.

2. During each repair, the valve body must undergo a magnetic particle inspection (MPI) on all surfaces. The results must satisfy the Level 2 requirements of standard JB/T 4730. The repair facility must record and archive these results promptly.

VIII. Transportation and Storage

1. During transportation, the plug valve must be strictly protected against collision and rain.

2. The plug valve should be stored in a ventilated, dry place, protected from direct sunlight and rain. It must not come into contact with corrosive substances such as acids, alkalis, or salts.

IX. Service

1. Under normal storage and usage conditions, if the product cannot be used normally due to manufacturing quality issues within one year from the date of delivery or within six months of use, our company is responsible for replacement or warranty repair free of charge.

2. Each product is accompanied by a Certificate of Conformity, a Packing List, and an Operation Manual.

3. All parts, except for the valve body, are considered wearing parts (consumables).

4. For any suggestions or feedback regarding our products, please fill out the "Customer Feedback Form" at the end of this document and send it via email.

Plug valve 钻井、修 井设备规范 钻井、修 井设备规范 钻井、修 井设备规范   钻井、修 井设备规范 钻井、修 井设备规范  钻井、修 井设备规范 钻井、修 井设备规范  钻井、修 井设备规范