Features

01. Mounted at any angle, keep cylinder position indicator vertically upward&installed horizontally which may extend life span 
02. Emergency manual device (operating mechanism) optional. Air source pressure: 3~8bar  
03. No viscosity limit and the flow direction of medium should be consistent with the arrow direction on the valve body 
04. Valve body material: Cast steel WCB (code: C), SS304 (code: B)
                                        SS316 (code: R), SS316L (code: L)
05. Nominal pressure: Normal---16bar, CL150Lb, special---25～250bar, Cl300～1500Lb
06. Control mode: QJ11---single acting NC                QJ12---single acting NO         QJ2---double acting control      
      QJ114X---single acting NC regulating type          QJ124X---single acting NO regulating type 
      QJ24X---double acting regulating type
       Note: X=1 refers to the regulating type 4～20mA. DC input and no signal output (normal) 
                 X=2 refers to the regulating type 4～20mA. DC input and output (special)
07. Special configuration: QJ-&---with emergency manual device        
                                          QJ-◆---with position limit switch (valve position signal output)

Table of Applicable Medium Temp. Range for Common Valve Body Materials and Seals

Note: *represents the temperature of conventional applicable medium.

Component and Material Table

Note: □---nominal diameter.

Structure Diagram

Application Code 

Note:

As shown in the diagram
DN＜100, the medium flows from left to right
DN≥100, the medium flows from right to left

Dimension

Note: The flange is manufactured according to JB/T79-1994 standard by default, sealing surface of PN16bar, PN25bar is raised face, PN40bar  

           is female face and can also be manufactured according to the standards specified by users, such as GB/T9124, HG/T20592, ANSI, JIS, 

           DIN and other standards.

QJ Series Flanged Carbon Steel and Stainless Steel Pneumatic Globe Valve – On-Off or Regulating Type

Product Overview

The BEST AUTOVALVE QJ Series Pneumatic Globe Valve is designed for industrial pipeline flow control and shut-off applications. Available in carbon steel and stainless steel configurations, the valve can be equipped with pneumatic actuators for on-off operation or regulating control.

The series supports single-acting and double-acting actuator configurations, with normally closed and normally open options for single-acting models. Regulating versions accept a 4–20 mA DC input signal for modulating valve operation.

With a flanged connection and multiple body and sealing material options, the QJ Series can be configured for different pressure, temperature and process requirements.

Key Features

• On-Off and Regulating Options: Available for both shut-off and modulating control applications.

• Pneumatic Actuation: Supports single-acting and double-acting actuator configurations.

• Normally Open or Normally Closed: Single-acting models are available in normally open and normally closed versions.

• Emergency Manual Operation: Optional manual operating mechanism for emergency operation.

• Flexible Installation: Can be installed at different angles. For horizontal installation, the cylinder position indicator should remain vertically upward.

• Flow Direction Identification: Follow the flow direction arrow marked on the valve body.

• Multiple Body Materials: Carbon steel WCB and stainless steel CF8, CF8M and CF3M options.

• Optional Accessories: Manual operating mechanism and valve position limit switch are available.

Product Models and Control Modes

For regulating models, the standard configuration uses a 4–20 mA DC input signal without signal output. A special configuration with signal output is also available.

Valve Body and Component Materials

The QJ Series offers several valve body material configurations:

Other component materials specified in the sample include:

• Sealing ring: Flexible graphite or normal PTFE, with special flexible graphite available.

• Packing: Flexible graphite + PTFE.

• Packing gland: Material corresponding to the valve body configuration.

• Bolts, nuts and gland hardware: Material options specified in the component table.

Applicable Medium Temperature Range

The applicable temperature range depends on the valve body material, stem packing and valve disc sealing material.

The sample lists the following material combinations:

Final temperature suitability should be confirmed against the selected material combination and actual operating conditions.

Pressure Ratings

The product sample identifies the following pressure options:

• Normal nominal pressure: PN16.

• Additional pressure options: PN25 and PN40.

• Other pressure-class configurations are referenced in the product features and should be confirmed for the specific model.

The sample also lists CL150 and other special pressure-class options. Actual pressure suitability depends on the valve configuration and applicable flange standard.

Pneumatic Actuator and Accessories

The QJ Series can be supplied with different pneumatic actuator action modes:

• Single-acting normally closed.

• Single-acting normally open.

• Double-acting.

Optional accessories include:

• Emergency manual operating mechanism.

• Valve position limit switch for position signal output.

For regulating configurations, the standard signal input is 4–20 mA DC. The normal configuration does not provide signal output; a special configuration with output is available.

The specified air source pressure is 3–8 bar.

Flanged Connection and Applicable Standards

The QJ Series uses flanged connections. The sample lists the following standards:

Other flange standards can be manufactured according to user requirements, including GB/T9124, HG/T20592, ANSI, JIS and DIN.

The standard flange face configuration depends on the pressure rating:

• PN16 and PN25: Raised-face configuration.

• PN40: Female-face configuration.

Applications

The QJ Series Pneumatic Globe Valve can be configured for industrial pipeline applications requiring pneumatic shut-off or regulating control. Selection should consider the process medium, operating temperature, pressure, required control mode and material compatibility.

Installation

The valve can be mounted at different angles. For horizontal installation, keep the cylinder position indicator vertically upward to help extend service life.

Always follow the flow direction arrow marked on the valve body. The sample specifies that the medium flows from left to right for DN below 100, and from right to left for DN100 and above, as viewed in the illustrated structure.

Warranty

Warranty terms should be confirmed with BEST AUTOVALVE for the specific order and supply configuration.