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The SUNTECHMACH SHJ250 hydraulic butt fusion welding machine welds HDPE, PP and PVDF pipes from 90mm to 250mm (3.5"-10") with stable hydraulic control and accurate temperature management (max 270°C). Strong aluminum frame, easy operation and maintenance, designed for field applications.
THE PROBLEM
HOW WE SOLVED IT
Inconsistent weld quality on site
Stable hydraulic pressure system for repeatable joints
Temperature drift ruins welds
Accurate heating plate control, max 270°C
Pipe alignment is fiddly
Complete standard clamp set (90-250mm) included
Machines not built for field use
Strong aluminum frame, designed for on-site projects
Key Features
Stable Hydraulic Pressure System — Consistent weld quality.
Accurate Temperature Control — Heating plate up to 270°C.
2.5Kw Planing Tool — Powerful facing for large pipe ends.
Verify the pressure gauge, timer and temperature controller function correctly before welding.
Check the heating plate Teflon coating integrity; verify it reaches the set temperature.
Check the trimmer works properly and the blades are sharp enough to face the pipe end evenly.
Perform a test welding before production.
B. 6-Phase Welding Procedure (per ISO 21307 / DVS 2207)
Phase 1 - Bead-up: approach both pipe ends to the heating plate at (P1 + Pt) pressure until the bead reaches the expected size.
Phase 2 - Soaking: reduce to maximum P2 pressure, keep the ends in touch with the heating plate for the full t2 time. The ends MUST NOT detach from the plate, otherwise the weld must be repeated.
Phase 3 - Plate removal: remove the heating plate within the maximum t3 (changeover) time without damaging the beads.
Phase 4 - Reach welding pressure: bring the ends together, gradually increasing pressure to (P5 + Pt) within t4.
Phase 5 - Welding: keep the ends together at (P5 + Pt) for the full t5 time.
Phase 6 - Cooling: keep the joint under pressure for t6; do not remove or strain the joint. Do NOT use water or compressed air to rush cooling.
P1 = bead-up pressure; P2 = max soaking pressure; P5 = welding pressure; Pt = dragging pressure (read from the gauge with pipes clamped; add to all pressure values).
C. Safety Notes
Earth the machine; the plug must meet IEC 309 type, IP44 minimum protection. Do not expose the machine to rain or liquids.
Wear safety glasses and gloves; keep a safe distance from the working trimmer and the hot heating plate.
Keep flammable material away from the heating plate and its support.
Unplug the machine from the power source immediately after use.
Standard
Material
Heating Temp
Key Notes
DVS 2207-1:2016
HDPE
220 ± 10°C
Max en = 130mm
ISO 21307:2017 (single high pressure)
HDPE
215 ± 15°C
Heater removal time approx. 5-12s
ISO 21307:2017 (single low pressure)
HDPE
225 ± 10°C
Longer cool time under pressure
DVS 2207-11:2017
PP
210 ± 10°C
Max en = 70mm; buildup time by ambient temp (≤15°C / 15-25°C / 25-40°C)
Common Faults & Solutions
Common faults
Reasons
Solutions
Narrow or falling bead on the joint
Welding pressure too high
Reduce pressure to the chart value (P5 + Pt)
Too small bead
Pressure not enough while welding
Increase to the chart welding pressure
Ditch in the joint
Temperature not reached, or changeover time too long
Reheat to full temperature; remove plate within t3
Misaligned joint
Alignment exceeds 10% of wall thickness
Re-align the two ends before welding
Pump motor does not work
Power not connected; loose socket; electrical fault
Check power, sockets, micro-switch and solid relay
Motor runs slowly with abnormal noise
Motor overloaded; oil filter blocked; unstable voltage
Check oil filter; confirm working pressure below rated; check voltage
Oil leakage
Worn hoses; loose/worn quick couplings; seal not fitted
Replace hoses; tighten or replace connectors; restore oil seal
Lack of pressure
Oil level low; relief valve open/out of order; blocked coupling; air in system
Top up oil; close or replace relief valve; purge air 30s via direction lever
Carriage trembling when moving
Air in hydraulic cylinders
Move the carriage back and forward via the direction lever to eliminate air
Heating plate cannot heat / display HH
Sensor or wiring disconnected; solid relay or controller failure
Check sensor and cable connections; replace solid relay or temperature controller
Trimmer cannot face with continuous chips
Blunt blade; blade lower than plate
Replace or shim the blade
FAQ
WHO ARE WE? — We are a professional pipe machine manufacturer in Hangzhou, China. Our team has worked in the pipe tool industry since 1989, and the company was registered in 2014. We are close to Shanghai, Ningbo and Yiwu ports, exporting mainly to North & South America, South Asia and the Middle East.
HOW CAN WE GUARANTEE THE QUALITY? — We always test at least one pipe on every machine before shipping. All our machines carry a 12-month warranty.
WHAT CAN YOU BUY FROM US? — Pipe threading machines, roll grooving machines, pipe cutting machines, pipe bending machines, plastic pipe welding machines, pressure test pumps and pipe tools.
WHY SHOULD YOU BUY FROM US? — We offer a full range of pipe tools; you can mix different models in one shipment. Multilingual support: English, Spanish, Japanese, Portuguese, German, Arabic, French, Russian, Korean, Hindi, Italian.
HOW LONG IS THE LEADTIME? — Usually 10-35 days after payment, depending on motor voltage customization.
HOW CAN YOU PLACE ORDER? — We accept T/T payment to our company account; online shop payment by credit card is also available.
HOW TO SHIP? — By sea to port for bulk orders; door-to-door delivery for small shipments.
WHAT IS THE MOQ? — No strict MOQ; however, we recommend an order amount of at least USD 2000 for cost-effective overseas shipping.
IS OEM ACCEPTABLE? — Yes. For bulk orders we can make nameplates and customized packaging in your brand.
Company Details
Bronze Gleitlager
,
Bronze Sleeve Bushings
and
Graphite Plugged Bushings
from Quality China Factory
Business Type:
Manufacturer,Distributor/Wholesaler,Agent,Trading Company
Year Established:
1990
Total Annual:
8,000,000-20,000,000
Employee Number:
<200
Ecer Certification：
Verified Supplier
HZ-SUNTECH is the Pipe Tools Division of CNSUNTECH Group, specializing in heavy-duty pipe fabrication and installation equipment for global contractors, distributors, and industrial users.
With over 20 years of industry experience, we focus on providing durable, jobsite-ready solutions for st... HZ-SUNTECH is the Pipe Tools Division of CNSUNTECH Group, specializing in heavy-duty pipe fabrication and installation equipment for global contractors, distributors, and industrial users.
With over 20 years of industry experience, we focus on providing durable, jobsite-ready solutions for st...
