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Pulte Electric Technology (Wenzhou) Co., Ltd. Home / Product / Agent's Choice / Bellows / DPJ End Style Union

DPJ End Style Union Manufacturer

DPJ End Connectors (Brass)

DPJ End Connectors (Brass)

● Product material: A.c.F part is made of high quality thickened brass, B.E part is made of nitrile rubber, D is made of iron sheet
● Thread specifications: British G, metric Mefyic, German PG
● Operating temperature:-40'C~+100'c,short time up to +120'C
● Product features: Flexible tube sheath design and hose connected design, strong tension can be waterproof, dustproof salt resistance, acid and alkali resistance, alcohol, oil, grease, and general solvents.
● Color Type: Metallic (silver white)
● Waterproof class:lP65

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  • DPJ End Connectors (Brass)
Metal vlexible hose Spiral tooth standard Thread O.D Thread Length Joint Length Packing
Metric System Inch M G PG D1 L1 L2+L3
φ6 3/16" M14x1.5 G1/4" PG7 13.2 8 16 100
φ8 1/4" M16x1.5 G3/8" PG9 13.2 8 16 100
φ10 5/16" M16x1.5 G3/8" PG9 16.5 8 17 100
φ12(13) 3/8" M20x1.5 G3/8" PG11 / PG13.5 16.5 8 18 100
φ15(16) 1/2" M20x 1.5/M24x1.5 G1/2" PG13.5/ PG16 21.3 11 23 100
φ20(19) 3/4" M27x2.0/M30x2.0 G3/4" PG21 26.6 14 22 50
φ25 1" M33x2.0/M36x2.0 G1" PG29 33.4 15 28 50
φ32 1-1/4* M42x2.0/M48x2.0 G1-1/4" PG29 42.1 15 30 25
φ38(40) 1-1/2* M48x2.0/M60x2.0 G1-1/2" PG36/PG42 47.8 16 32 25
φ51(50) 2" M60X2.0/M72x 2.0  G2" PG48 59.6 18 34 10
φ64(70) 2-1/2" M76x2.0 G2- -1/2" 75.1 22 38 10
φ75(80) 3" M88x2.0 G3" 87.8 22 46 5
φ100 4" M114x2.0 G4" 113 24 50 5
φ125 5" M140x2.0 G5" 5
φ150 6" M164x2.0 G6" 2
DPJ End Connectors (Zinc Alloy)

DPJ End Connectors (Zinc Alloy)

● Product material: A.c.F part is made of high quality thickened brass, B.E part is made of nitrile rubber, D is made of iron sheet
● Thread specifications: British G, metric Mefyic, German PG
● Operating temperature:-40'C~+100'c,short time up to +120'C
● Product features: Flexible tube sheath design and hose connected design, strong tension can be waterproof, dustproof salt resistance, acid and alkali resistance, alcohol, oil, grease, and general solvents.
● Color Type: Metallic (silver white)
● Waterproof class:lP65

Contact Us Return
  • DPJ End Connectors (Zinc Alloy)
Metal vlexible hose Spiral tooth standard Thread O.D Thread Length Joint Length Packing
Metric System Inch M G PG D1 L1 L2+L3
φ6 3/16" M14x1.5 G1/4" PG7 13.2 8 16 100
φ8 1/4" M16x1.5 G3/8" PG9 13.2 8 16 100
φ10 5/16" M16x1.5 G3/8" PG9 16.5 8 17 100
φ12(13) 3/8" M20x1.5 G3/8" PG11 / PG13.5 16.5 8 18 100
φ15(16) 1/2" M20x 1.5/M24x1.5 G1/2" PG13.5/ PG16 21.3 11 23 100
φ20(19) 3/4" M27x2.0/M30x2.0 G3/4" PG21 26.6 14 22 50
φ25 1" M33x2.0/M36x2.0 G1" PG29 33.4 15 28 50
φ32 1-1/4* M42x2.0/M48x2.0 G1-1/4" PG29 42.1 15 30 25
φ38(40) 1-1/2* M48x2.0/M60x2.0 G1-1/2" PG36/PG42 47.8 16 32 25
φ51(50) 2" M60X2.0/M72x 2.0 ! G2" PG48 59.6 18 34 10
φ64(70) 2-1/2" M76x2.0 G2- -1/2" 75.1 22 38 10
φ75(80) 3" M88x2.0 G3" 87.8 22 46 5
φ100 4" M114x2.0 G4" 113 24 50 5
φ125 5" M140x2.0 G5" 5
φ150 6" M164x2.0 G6" 2
About Us
Pulte Electric Technology (Wenzhou) Co., Ltd.
Pulte Electric Technology (Wenzhou) Co., Ltd. is a China Custom DPJ End Style Union Manufacturer and Sale DPJ End Style Union Factory specializing in producing cable connectors, waterproof junction boxes, and other electrical product accessories. The company was born in the electrical town known as the "China Electrical Capital". It is a professional modern enterprise integrating R&D, production, and sales. Focusing on the brand building of Pulte "PULTE", with excellent technical crispness and efficient quality assurance, satisfactory and thoughtful sales service, and reasonable and affordable prices, its various technical indicators and product performance are better than its peers, and are widely used in junction boxes, distribution cabinets, communication equipment, instruments, and meters, medical equipment, machine tools, artificial intelligence, automation equipment, and other fields: constantly innovating, developing new products, forming a series of waterproof cable connectors, waterproof junction boxes, cold blocking parts, cable connector accessories, hose waterproof connectors and other products. At the same time, Wenzhou Pulte International Trade Co., Ltd., a subsidiary of the company, actively expands the international market and is committed to providing high-quality products and services to global customers, effectively broadening the company's market channels, enhancing market competitiveness, and laying the foundation for expanding the scale of the enterprise. The company has strong technical strength and is jointly established by industry veterans. It has a professional position in the field of cable connector manufacturing. We have a complete quality assurance system and rich design and manufacturing experience. Our products are widely used in various industries and are highly reliable. We provide professional and high-quality cable-supporting products for customers. We believe that there is a product that meets your needs in our complete series of products.
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Industry Knowledge Extension

What are the Characteristics and Limitations of a DPG End Style Union?

A DPG (Double Parallel Guide) End Style Union represents a specific and robust design within this category, offering distinct advantages and some inherent constraints. Understanding these characteristics and limitations is crucial for engineers and technicians to ensure proper application and system reliability.

The defining characteristic of a DPG End Style Union is its guided disc and ring design. Unlike a standard union that may allow for misalignment, the DPG design features a mechanism that keeps the sealing elements—typically a disc and a ring—parallel during the tightening process. This guided alignment ensures a uniform and consistent seal around the entire circumference, significantly enhancing the joint's integrity. This design is particularly valued for its ability to maintain a leak-tight seal under conditions of system vibration, pressure fluctuations, and thermal cycling, which can cause other connection types to fail. Furthermore, the end style configuration means it is designed to be welded or otherwise attached to the end of a pipe, providing a permanent and sturdy connection point for the reusable union assembly.

However, this specialized design also introduces certain limitations. The initial cost of a DPG union is typically higher than that of a standard union due to its more complex manufacturing process and precision components. This can impact the overall budget for a project, though it is often offset by reduced maintenance costs. Secondly, installation requires a higher degree of care and precision. The welding of the end pieces must be performed correctly to avoid introducing distortions or heat-affected zone issues that could compromise the union's sealing performance. Finally, while the union itself is reusable, its initial installation is a more permanent commitment compared to a threaded connection. Replacing the welded end piece would require cutting and re-welding, which is a more involved process than simply unscrewing a threaded fitting.

What is the Typical Process for a DPG Inner Threaded Union?

The manufacturing of a DPG Inner Threaded Union is a meticulous process that combines precision machining with rigorous quality control to create a reliable and reusable piping component. This process ensures the union's critical features—its threads, sealing surfaces, and guiding mechanism—are produced to exact specifications for a leak-tight seal.

Step 1: Material Preparation and Rough Machining

The process begins with the selection of raw material, typically a forged or rolled bar of carbon steel, stainless steel, or a specialty alloy chosen for its strength and corrosion resistance. This raw stock is then cut to size. The pieces are mounted on computer numerical control (CNC) lathes where the initial rough machining takes place. This step creates the basic external and internal cylindrical forms of the union's main body and nut, removing the bulk of the excess material. The initial turning operations also establish the crucial preliminary dimensions for the subsequent threading and finishing stages.

Step 2: Precision Threading and Groove Cutting

After rough machining, the components move to the precision threading phase. Using specialized threading tools on the CNC lathe or a dedicated threading machine, the internal threads of the union body and the external threads of the nut are cut with high accuracy. The thread profile, pitch, and depth must be machined to strict tolerances to ensure smooth engagement and a secure fit. Simultaneously, the specific grooves that will house the DPG's guiding ring and seal are machined into the union body. This step requires precision, as the geometry and surface finish of these grooves are fundamental to the self-aligning, parallel sealing action that defines the DPG union's performance.

Step 3: Finishing, Inspection, and Assembly

The final manufacturing stage involves finishing and validation. All machined surfaces, particularly the sealing faces, may be finely polished or ground to achieve the required surface finish that ensures sealing contact. Each component is thoroughly cleaned to remove any machining chips or oils. Then, a battery of inspections is conducted. This includes using thread gauges to verify thread accuracy, coordinate measuring machines (CMM) to check critical dimensions, and visual inspections for surface defects. Finally, the components—the body, nut, seal ring, and guide disc—are assembled into a complete union unit, often packaged with protective caps to prevent damage to the threads and sealing surfaces during shipping and storage.