Fixed Barrel Twin Screw Extruder
SHJ fixed barrel Co-rotating Twin Screw Extruder
The pelletizing systems are also optional including water strand pelletizing, water ring pelletizing, hot die face cutting & air cooling, strand pelletizing with air cooling belt, underwater pelletizing system, which is subject to the capacity, material formula and final granules requirement
Pvc Granule Making Equipment,Compound Extruder Machine,Double Screw Compounding,Compounding Extruder Line JIANGSU XINDA TECH LIMITED , https://www.xindacompounding.com
SHJ Co-rotating Twin Screw Extruder
The XINDA SHJ twin screw series are fixed barrel design co-rotating twin screw extruder based on building block. The segmented screw geometry can be versatile for multiple application of compounding for plastic and rubber. XINDA has provided customers with different options in the gearbox including high torque gearbox. XINDA can provide enough stability and durability for the mass production of compounding process.
**Model NO.:** IS-3F (Intercom System with 3 Frequencies)
**HS Code:** 84313900
### Product Description
This intercom system is specifically designed to provide **crystal clear communication**, enhancing safety and productivity on construction sites. It is an essential tool that reduces the risk of accidents and improves overall efficiency by enabling instant contact between workers and elevator operators.
### Safety First
The IS-3F intercom system is widely used in **construction hoists and temporary elevators** and is recommended by OSHA. It’s considered the industry standard in the USA, Canada, and Australia. In emergencies, such as a worker being injured or experiencing a medical issue, quick communication can be life-saving.
Beyond emergency use, it also supports general communication between supervisors and workers, minimizing downtime and boosting project profitability.
### Key Features
- All units are interchangeable
- No antenna wires required
- Two-way communication
- Volume-controlled car units
- Powered by safe 24V DC
- Multiple frequency channels (250KHz, 741KHz, 800KHz)
- Emergency alarm switches on all units
- Operates in extreme weather conditions
- Backup battery power for car unit
- Durable composite nylon housing
- Microphone gain adjustment
- Mute function for controlled communication
### Made in China
Designed and manufactured in China, this product integrates the latest technology and undergoes strict quality control to ensure reliability and performance. It is OSHA-recommended and ideal for high-demand construction environments.
### Application
- **Used in industrial elevators and construction hoists**
- **Enables emergency calls between workers and elevator operators**
- **Improves efficiency and prevents accidents**
- **Ideal for intensive elevator areas without needing radio frequency approval**
### Functional Features
- Uses a **protected loop line** for stable and reliable signal transmission
- **No high-voltage connection** between signal and power lines for enhanced safety
- **No electromagnetic pollution**, no need for radio frequency licensing
- **Emergency alarm button** for immediate assistance
- **Three available frequencies** for clear and natural voice communication
- **Electronic volume control** for easy adjustment
- **Squelch function** to reduce background noise
- **Busy indicator** when communication is in progress
### Specification Parameters
- **Supply Voltage:** 220V AC or 110V AC
- **Effective Range:** Over 300 meters (with conductor loop resistance <600 ohms)
- **Available Frequencies:** 250KHz, 741KHz, 800KHz
### Installation Instructions
#### On Each Floor
Install the intercom according to the provided diagrams. Connect the unit to the power cable. Note: A dedicated power supply should drive less than 20 units. Another port can be connected to the junction box and coupler. The ground wire must pass through the coupler and be properly grounded—never connect it to the middle ground.
#### In the Lifting Cage
Install the cage intercom as shown in the diagram. Connect the intercom, call device power, and coupler. Ensure the protective ground wire passes through the coupler and is grounded correctly.
### Terminal Description of Special Power Supply Device
| NO | Cable | Color | Description |
|----|-----------|-----------|----------------------------|
| 1 | Power | Blue | |
| 2 | Power | Brown | Three-core cable |
| 3 | Ground | Yellow | |
| 4 | Shield | | |
| 5 | Negative | Brown | Four-core shielded cable |
| 6 | Positive | Black | |
| 7 | Positive | Blue | |
### Common Usage Issues & Explanations
| FAQ | Explanation |
|----------------------------|-----------------------------------------------------------------------------|
| Communication Failure | The coupler's protective ground is improperly grounded in the middle. |
| Poor Communication | High resistance due to poor grounding or bad connections. |
| Interference from Motor | Cables require better shielding to prevent interference. |
This intercom system is a reliable, efficient, and safe solution for construction sites, ensuring clear and consistent communication between workers and operators. Whether for daily tasks or emergency situations, the IS-3F model delivers excellent performance and durability.