Features

01. Manual control valve is used for urban central heating, thermal power plants pipe network recycled water project and refrigeration  air-

      conditioning, etc. It has the function of cutting-off, throttling and flow adjustment, can replace the throttle orifice plate. It is a kind of

      changeable flow hole throttle device
02. Equal percentage, linearity, parabola and other flow characteristic can be chosen. General default flow characteristic is equal percentage
03. Manual control valve can control accurately according to flow demand, it´s the best choice of flow, pressure, temp. and other parameters

      control in manual valves

Coding System Instruction

Main Technical Parameters

Basic Structure Diagram

Main Component Material Table

Related Instructions and Installation Precautions for Use

1. The flow regulation of the rotary manual control valve is achieved by the relative rotation of the cylindrical valve core and valve seat to change the window area on the valve core.
2. The switch position of the rotary manual control valve is indicated by the opening indicator board above the valve, and the indicated switch position is consistent with the actual switch position of the valve.
3. The rotary manual control valve is operated by a handle, with a maximum turning angle of 60°.
4. When the plunger type manual control valve rotates the handwheel clockwise, the valve stem drives the valve core to decline until the two conical sealing surfaces come into contact and the pipeline is fully closed.
5. When the plunger type manual control valve rotates the handwheel counterclockwise, the valve stem drives the valve core to rise until the two conical sealing surfaces separate and the pipeline is fully open.
6. The T40 series plunger type manual control valve should be installed on a horizontal pipeline and must be installed vertically; the T44 series rotary manual control valve can be installed at any angle.
7. The medium flow direction of the T40 series plunger type manual control valve must be same as the arrow direction on the valve body; the T44 series rotary manual control valve can flow in both directions without flow direction limit.

Normal Body Material and Sealing Material Applicable Temp. Range Form

Notes:

1. *means the normal applicable medium temperature.
2. Stainless steel valve bodies can also be customized for low temperature type according to users´ requirements.

External Dimension (Pn16bar)

Note: The flange is manufactured according to JB/T79-1994 standard by default, and can also be manufactured according to user specified 

          standard, such as GB/T9124, HG/T20592, ANSI, JIS, DIN, etc.

T40 Plunger Type & T44 Rotary Type Manual Control Valve

The BEST T40 Series Plunger Type and T44 Series Rotary Type Manual Control Valves are designed for manual shut-off, throttling and flow regulation in industrial piping systems. They can be used in applications such as urban central heating, thermal power plant recycled-water pipe networks, and refrigeration and air-conditioning systems.

These manual control valves provide adjustable flow characteristics to meet different operating requirements. Equal-percentage flow characteristics are the general default, while linear and parabolic characteristics can also be selected.

The series is available in two structural designs: the T40 plunger type, operated by a handwheel, and the T44 rotary type, operated by a handle.

Key Features

• Two Structural Designs: T40 plunger type and T44 rotary type.

• Multiple Control Functions: Shut-off, throttling and flow adjustment.

• Selectable Flow Characteristics: Equal percentage, linear and parabolic.

• Wide Size Range: DN20 to DN300.

• Multiple Pressure Options: The technical parameter table lists PN16, PN25, PN40, PN63 and PN100.

• Adjusting Accuracy: ±10%.

• Leakage Performance: Hard sealing level IV and soft sealing level VI, as specified in the manual.

• Material Options: Carbon steel and stainless steel configurations, with different valve disc and sealing material combinations.

• Manual Operation: Handwheel operation for T40 and handle operation for T44.

Technical Specifications

T40 Plunger Type Manual Control Valve

The T40 series uses a plunger-type structure. Turning the handwheel clockwise drives the valve stem and valve core downward until the two conical sealing surfaces contact each other, fully closing the pipeline.

Turning the handwheel counterclockwise raises the valve core, separating the conical sealing surfaces and fully opening the pipeline.

Installation and Flow Direction:

• The T40 series should be installed on a horizontal pipeline and must be installed vertically.

• The medium flow direction must match the arrow marked on the valve body.

T44 Rotary Type Manual Control Valve

The T44 series uses a rotary structure. Flow regulation is achieved by rotating the cylindrical valve core relative to the valve seat, changing the window area on the valve core.

The valve is operated by a handle, with a maximum turning angle of 60°. An opening indicator board above the valve shows the switching position, which the manual states is consistent with the actual valve position.

Installation and Flow Direction:

• The T44 series can be installed at any angle.

• The medium can flow in either direction; there is no flow-direction limitation stated for this series.

Materials and Temperature Options

The manual lists the following valve body material options in its coding and material tables:

• Carbon steel, including WCB and forged steel A105 options in the coding system

• SS304 / CF8

• SS316 / CF8M

• SS316L / CF3M

Other material options, including Hastelloy, are also listed in the coding system.

Valve disc and seat materials include SS304, SS316 and SS316L, with overlaying Stellite alloy or PTFE options. The manual also lists alloy steel, hard alloy and valve-body material sealing configurations.

The temperature range depends on the selected body material and sealing configuration. The technical parameter section lists:

• Carbon steel normal: -29°C to 150°C

• Carbon steel special: -29°C to 350°C

• Stainless steel normal: -40°C to 150°C

• Stainless steel special: -40°C to 450°C

• Additional stainless steel low-temperature options: -100°C to 150°C and -196°C to 150°C

The applicable temperature must be confirmed for the specific material and sealing combination.

Main Applications

• Urban central heating systems

• Thermal power plant recycled-water pipe networks

• Refrigeration and air-conditioning systems

• Industrial piping systems requiring manual shut-off, throttling or flow adjustment

Warranty

The instruction manual specifies a one-year warranty under the technical conditions stated in the manual, effective from delivery. Faults caused by user operation or installation are excluded from warranty coverage; assistance will be provided to help resolve such issues.

For product selection, please confirm the required nominal diameter, pressure rating, flow characteristic, valve structure and operating conditions with BEST AUTOVALVE.