Offers to Sell

　　Hydraulic systems are integral to the operation of steel plants, powering a range of heavy machinery, from presses to continuous casting machines. Hydraulic cylinders, in particular, are pivotal in controlling movement and force in various processes, including mold oscillation, rolling mill adjustments, and material handling. However, the efficiency and longevity of these hydraulic cylinders largely depend on the seals that keep hydraulic fluids contained and protect the internal components from contamination. 　　In the context of steel plants, where high pressures, temperatures, and harsh operating conditions are the norm, the selection of hydraulic cylinder seals becomes a crucial factor in ensuring smooth operations and minimizing downtime. Let’s explore the different types of seals commonly used in steel plant hydraulic systems. 　　1. Rod Seals 　　Rod seals are placed on the piston rod of a hydraulic cylinder and are responsible for maintaining the pressure of the hydraulic fluid while preventing the leakage of oil. These seals also protect the cylinder from external contaminants such as dust, dirt, or steel shavings. 　　Typically, nitrile rubber (NBR), polyurethane (PU), or fluorocarbon (FKM) are used for these seals due to their resistance to both high temperatures and abrasion. In steel plants, where the ambient temperature and friction levels are often extreme, FKM seals are commonly used due to their superior thermal stability. 　　2. Piston Seals 　　Piston seals prevent hydraulic fluid from leaking through the piston, ensuring that the pressure generated inside the cylinder is maintained. In high-pressure applications typical of steel plants, these seals are often designed with dual-lip or quad-ring configurations to enhance sealing performance and durability. 　　For materials, NBR and HNBR (hydrogenated nitrile rubber) are widely used because of their ability to withstand moderate to high pressure and their resistance to wear. However, in environments where extreme temperatures or exposure to chemicals (such as hydraulic oils) is present, FKM and PTFE (polytetrafluoroethylene) seals are preferred due to their enhanced chemical resistance and high-temperature tolerance. 　　3. Wiper Seals 　　Wiper seals, also known as scraper seals, are essential in steel plants for preventing external contaminants, such as slag, dust, and moisture, from entering the hydraulic system. These seals are typically installed at the rod- end of the cylinder. 　　The primary function of the wiper seal is to “wipe” off debris from the piston rod as it extends or retracts, maintaining the cleanliness of the hydraulic cylinder. Polyurethane (PU) and rubber-metal composites are often used for wiper seals, as they offer good abrasion resistance and can perform under harsh conditions. 　　4. Bearings and Back-up Rings 　　In some steel plant hydraulic cylinders, bearings and back-up rings are used alongside primary seals to support the hydraulic piston and prevent excessive wear. Bearings are used to support radial forces, while back-up rings help prevent extrusion of seals under high-pressure conditions. 　　PTFE is often the material of choice for back-up rings due to its low friction properties and resistance to chemical attack. For bearings, bronze or high-strength steel is frequently utilized in combination with seals to ensure long-term performance under heavy-duty operations. 　　5. Valve Seals 　　In certain hydraulic systems, valve seals are used to ensure proper flow control and pressure regulation. These seals are critical in maintaining the integrity of the fluid passage in the valve assembly. For steel plant applications, O-rings, lip seals, and V-rings are commonly used in valve systems. 　　The material selection for valve seals largely depends on the fluid compatibility, pressure requirements, and temperature tolerance. Nitrile rubber (NBR) is typically chosen for general-purpose use, while FKM is preferred in systems exposed to high temperatures or aggressive chemicals. 　　Key Considerations for Seal Selection in Steel Plant Hydraulics 　　When selecting hydraulic seals for steel plant applications, several factors must be considered: 　　Temperature Range: Seals must be able to handle high temperatures typical in steel production environments, which can reach up to 200°C or more. 　　Chemical Resistance: Many steel plant processes involve exposure to aggressive chemicals and lubricants, so seals must be resistant to chemical attack. 　　Pressure and Load Requirements: Hydraulic cylinders often operate under high pressure, and seals must be able to maintain integrity under such conditions. 　　Contamination Resistance: Seals must be able to withstand contamination from steel dust, slag, and other particles without failing. 　　The role of hydraulic cylinder seals in steel plants is far more than just a mechanical function—they are integral to the efficiency and reliability of the entire hydraulic system. Understanding the different types of seals, from rod seals to wiper seals and piston seals, allows plant engineers and maintenance teams to make informed decisions about sealing solutions.

Minimum Order: 100

Buy New Roland VersaUV LEF2-300D Benchtop Flatbed UV Printer Price : USD 17,250.00 Min Order : 1 Unit Lead Time : 6 – 9 Days Port : Kualanamu International Airport Payment : Wise, Bank Transfer, Western union, Xoom, Moneygram & Worldremit Shipment : FedEx, DHL, UPS Product : 100% New original & Warranty Harisefendi is 100% safe, Because purchase products at Harisefendi provide a 100% money back guarantee. Site us : https://harisefendi.com/ Contact Purchase : order@harisefendi.com Phone/Whatsapp : +6281235792168

Minimum Order: 1 bags

Buy New Mimaki CF2-1215 Price : USD 18,220.00 Min Order : 1 Unit Lead Time : 6 – 9 Days Port : Kualanamu International Airport Payment : Wise, Bank Transfer, Western union, Xoom, Moneygram & Worldremit Shipment : FedEx, DHL, UPS Product : 100% New original & Warranty Harisefendi is 100% safe, Because purchase products at Harisefendi provide a 100% money back guarantee. Site us : https://harisefendi.com/ Contact Purchase : order@harisefendi.com Phone/Whatsapp : +6281235792168

Minimum Order: 1 bags

Calcium Hypochlorite 70% (Sodium Process) - B2B Product Data Product Overview Product Name: Calcium Hypochlorite 70% (Sodium Process) CAS No.：7778-54-3 Grade: Industrial Grade Production Process: Sodium-based manufacturing process for high purity and stability Key Technical Parameters Test Items Standards Test Results Available Chlorine ≥70% ≥70% Moisture 5%-10% 5%-10% Chlorine Loss ≤8% 5% Solubility Rate ≥90% 96% Appearance Light gray granular Conform Packaging & Storage Packaging: 25kg/50kg plastic woven bags with inner PE liners Customized packaging available upon request Storage Conditions: Store in sealed containers in dry, ventilated areas Avoid direct sunlight, moisture, and high temperatures Keep away from inflammable materials Applications Water Treatment: Drinking water disinfection, swimming pool water treatment, industrial wastewater purification Disinfection: Sanitization for hospitals, food processing plants, public facilities Bleaching: Paper pulp bleaching, textile bleaching agents Agriculture: Livestock farm disinfection, soil sterilization Quality Assurance Testing Standard: Complies with GB/T10666-2019 Batch Traceability: Sample Date: 2025-04-02 Batch No: 20250402 Test Conclusion: Qualified Delivery & Service Lead Time: 7-15 working days for standard orders Minimum Order Quantity (MOQ): 1 MT Technical Support: Professional guidance on application and dosage If you are interested in our products, please contact: Bill Zhang Sales Director SHANDONG SUMCHEMICALS CO., LTD. Mobile/ WhatsApp: +86 156 6271 5985 QQ: 3267823033 Wechat: billzhang5985 E-mail: bill@sumsupply.com E-mail: billzhangsales@gmail.com

Minimum Order: 2 barrels

Poly Aluminium Chloride (PAC 28%) - Certificate of Analysis Product Overview Product Name: Poly Aluminium Chloride (PAC) Grade: Industrial Grade Formula: [Al₂(OH)ₙCl(6₋ₙ)]ₘ (m ≤ 10, n ≤ 5) Key Content: Aluminium Oxide (Al₂O₃) ≥ 28.0% Physical & Chemical Properties Item Specification Test Result Remarks Appearance Yellow Powder Yellow Powder Visual inspection Solubility Easily Soluble Easily Soluble In water Toxicity Non-toxic Non-toxic Safety standard Solution Color Yellow Yellow Identification test Key Technical Indicators Item Standard Requirement Test Result Significance Al₂O₃ Content ≥28.0% 28.25% Core active ingredient Basicity 70~90% 70.23% Hydroxyl ion ratio pH (1% Aqueous Solution) 3.5~5.0 4.0 Acid-base property Water Insoluble Matter 1.5~2.5% 1.7% Purity indicator Iron (Fe) Content ≤5% 3.0% Impurity control Packaging & Storage Packaging: Double-layer bag: Inner plastic liner + outer woven bag Net weight: 25kg/bag (customizable packaging available) Storage Conditions: Seal tightly and store in dry, ventilated areas Avoid rain, high temperatures, and direct sunlight Shelf Life: 24 months under proper storage conditions Application Scenarios Water treatment (sewage purification, industrial wastewater treatment) Paper sizing agent Cosmetic additive (auxiliary agent) Petrochemical industry (oilfield water treatment) Quality Assurance Strict compliance with international quality standards Full-process quality monitoring from raw materials to finished products Professional QC team ensures batch-to-batch consistency Delivery & Service Fast delivery within 7-15 working days Technical support for application solutions Customized production according to specific requirements If you are interested in our products, please contact: Bill Zhang Sales Director SHANDONG SUMCHEMICALS CO., LTD. Mobile/ WhatsApp: +86 156 6271 5985 QQ: 3267823033 Wechat: billzhang5985 E-mail: bill@sumsupply.com E-mail: billzhangsales@gmail.com

Minimum Order: 2 barrels

Buy New Roland VersaUV LEC-330 Price : USD 27,250.00 Min Order : 1 Unit Lead Time : 6 – 9 Days Port : Kualanamu International Airport Payment : Wise, Bank Transfer, Western union, Xoom, Moneygram & Worldremit Shipment : FedEx, DHL, UPS Product : 100% New original & Warranty Harisefendi is 100% safe, Because purchase products at Harisefendi provide a 100% money back guarantee. Site us : https://harisefendi.com/ Contact Purchase : order@harisefendi.com Phone/Whatsapp : +6281235792168

Minimum Order: 1 bags

Buy New Mimaki CF2-1218 Price : USD 19,250.00 Min Order : 1 Unit Lead Time : 6 – 9 Days Port : Kualanamu International Airport Payment : Wise, Bank Transfer, Western union, Xoom, Moneygram & Worldremit Shipment : FedEx, DHL, UPS Product : 100% New original & Warranty Harisefendi is 100% safe, Because purchase products at Harisefendi provide a 100% money back guarantee. Site us : https://harisefendi.com/ Contact Purchase : order@harisefendi.com Phone/Whatsapp : +6281235792168

Minimum Order: 1 bags

Aluminium Sulfate (Al₂(SO₄)₃) - Versatile Industrial Coagulant & Chemical Intermediate Product Overview Aluminium sulfate is a water-soluble inorganic salt with the formula Al₂(SO₄)₃, widely recognized for its role as a coagulating agent in water treatment and as a key additive in paper manufacturing. Available in anhydrous form (rare mineral millosevichite) and hydrated forms (notably hexadecahydrate Al₂(SO₄)₃·16H₂O and octadecahydrate Al₂(SO₄)₃·18H₂O), this compound delivers exceptional performance across industrial, environmental, and technical applications. Key Applications 1. Water Treatment & Purification Coagulant for Drinking Water & Wastewater: Neutralizes particle charges to promote flocculation, removing impurities in municipal and industrial water systems. Pool & Cooling Tower Treatment: Efficiently clarifies water by precipitating suspended solids. Mining Wastewater: Reduces turbidity and heavy metal ions through coagulation. 2. Paper Manufacturing Papermaker’s Alum: Acts as a sizing agent to improve ink retention and paper strength, and as a flocculant in pulp processing. 3. Construction & Fire Safety Concrete Accelerator & Waterproofing Agent: Speeds up setting time and enhances water resistance. Fire Extinguishing Foam: Reacts with sodium bicarbonate to generate CO₂-rich foam, smothering hydrocarbon fires (commonly used in Japan/India). 4. Agriculture & Horticulture Soil pH Regulator: Lowers soil alkalinity, ideal for acid-loving plants (e.g., hydrangeas, which change flower color with pH adjustment). Molluscicide: Effective against Spanish slugs in agricultural settings. 5. Industrial & Chemical Synthesis Textile Dyeing Mordant: Fixes dyes to fibers by forming insoluble pigment- alum complexes. Phase Transfer Catalyst: Facilitates organic reactions (e.g., Williamson ether synthesis). Antiperspirant & Medicinal Ingredients: Historical use in antiperspirants and sting relief products (e.g., Stingose). Physical & Chemical Properties Property Parameter Chemical Formula Al₂(SO₄)₃ CAS Number 7647-15-6 Appearance White crystalline powder/granules Solubility 90.5 g/100mL water (25°C) Density 3.21 g/cm³ (crystal) Melting Point 747°C Boiling Point 1,390°C pH (5% Solution) 6.5-8.0 Hygroscopicity Strong (requires moisture-proofing) Packaging & Supply Chain Packaging Options: 25kg/50kg plastic-lined woven bags 1000kg ton bags Customized IBC tanks (20,000L) for bulk orders Storage Conditions: Cool, ventilated warehouse; keep away from oxidants and moisture. Transportation: Non-hazardous (UN no special requirements); protected from rain and high temperatures. Quality & Compliance Purity Grades: Industrial grade: ≥99.0% Reagent grade: ≥99.9% Standards: Compliant with ISO 9001, REACH (for EU markets), and local environmental regulations. Safety & Handling Hazard Warnings: Irritant to eyes and mucous membranes; avoid inhalation of dust. Emergency Measures: Skin/eye contact: Rinse with water; seek medical advice. Ingestion: Induce vomiting with warm water. Storage Precautions: Separate from strong acids and oxidants; use dust masks and protective gear during handling. Why Partner With Us? Factory Direct Supply: Competitive pricing with direct access to production facilities. Technical Expertise: Customized solutions for water treatment capacity planning and formulation support. Global Logistics: Efficient shipping to North America, Europe, Southeast Asia, and beyond. If you are interested in our products, please contact: Bill Zhang Sales Director SHANDONG SUMCHEMICALS CO., LTD. Mobile/ WhatsApp: +86 156 6271 5985 QQ: 3267823033 Wechat: billzhang5985 E-mail: bill@sumsupply.com E-mail: billzhangsales@gmail.com

Minimum Order: 2 barrels

Sodium bromide product technical information Product name: Sodium bromide (Sodium Bromide) Chemical formula: NaBr CAS number: 7647-15-6 Purity grade: Industrial grade: ≥99.0% Pharmaceutical grade: ≥99.5% (in accordance with USP/EP standards) Reagent grade: ≥99.9% Appearance: white crystalline powder or granules Solubility: easily soluble in water (90.5 g/100ml, 25°C), slightly soluble in alcohol Key physical and chemical properties Item Parameters Molecular weight 102.89 g/mol Density 3.21 g/cm³ (crystal) Melting point 747°C Boiling point 1,390°C pH value (5% solution) 6.5-8.0 Hygroscopicity Strong (strict moisture-proof) Core application areas 1. Pharmaceutical synthesis Antiepileptic/sedative raw materials: synthetic barbiturates (such as phenobarbital) Contrast agent excipients: stabilizer for sodium iodide solution for CT scanning 2. Industrial water treatment Bactericides and algaecides: Bromine-based disinfectants for cooling towers and swimming pools (replacing chlorine and reducing the production of carcinogens) Oilfield drilling fluids: inhibit sulfate-reducing bacteria (SRB) from corroding pipelines 3. Photosensitive industry Photographic emulsions: bromide ion source for traditional film developers 4. Organic synthesis Phase transfer catalysts: Williamson ether synthesis reaction Bromination reagents: preparation of brominated alkanes (such as ethyl bromide) 5. Flame retardant additives Enhance the flame retardant properties of plastics/textiles (synergistic with antimony oxide) Packaging and storage and transportation specifications Packaging form Specifications Transport mark Plastic-lined woven bag 25 kg/bag Non-hazardous goods Moisture-proof cardboard barrel 50 kg/barrel (lined with PE bag) UN No requirements Ton bag 1000 kg/bag Avoid mechanical damage Reagent bottle 500 g/bottle (brown glass bottle) For laboratory use only Storage conditions Environmental requirements: cool and dry warehouse, relative humidity ≤40% Stacking limit: pallet stacking ≤3 layers to prevent packaging damage Contraindications: keep away from strong acids and strong oxidants (such as nitric acid, potassium permanganate) Shelf life: 24 months in a sealed state Safety and operating specifications Health hazards: Excessive inhalation of dust can cause respiratory irritation (N95 masks are required for operation) High concentration solutions contact the skin and cause burns (wear PVC gloves) Emergency treatment for leaks: Use a plastic shovel to collect solids and place them in a closed container Flush the contaminated area with large amounts of water to the wastewater treatment system Customized services Particle size customization: Coarse particles (1-3mm, anti-caking type for oil fields) Ultrafine powder (200 mesh, accelerated pharmaceutical synthesis reaction) If you are interested in our products, please contact: Bill Zhang Sales Director SHANDONG SUMCHEMICALS CO., LTD. Mobile/ WhatsApp: +86 156 6271 5985 QQ: 3267823033 Wechat: billzhang5985 E-mail: bill@sumsupply.com E-mail: billzhangsales@gmail.com

Minimum Order: 2 barrels

We are Etil Gold Collections Company, based in the West Africa Region with headquarters in Accra Ghana and branches in Sierra Leone, Burkina Faso, Mali, Nigeria, DR Congo, Kenya and Liberia. We are looking to expand our network of reputable gold buyers and actively seeking genuine and reliable buyers of Au Gold. We will provide and supply 23-Carats (96% Pure Gold. And above) to prospective gold buyers. Please Note, this is Full CIF transaction, where seller pays all the taxes and insurance fees until products arrive at buyer port of destination, where buyer carries out his or her refinery smelting test before payment.

Buy New Roland VersaUV LEJ-640 UV Hybrid/Flatbed Printer Price : USD 28,750.00 Min Order : 1 Unit Lead Time : 6 – 9 Days Port : Kualanamu International Airport Payment : Wise, Bank Transfer, Western union, Xoom, Moneygram & Worldremit Shipment : FedEx, DHL, UPS Product : 100% New original & Warranty Harisefendi is 100% safe, Because purchase products at Harisefendi provide a 100% money back guarantee. Site us : https://harisefendi.com/ Contact Purchase : order@harisefendi.com Phone/Whatsapp : +6281235792168

Minimum Order: 1 bags

Buy New Mimaki CF3-1610 Price : USD 42,250.00 Min Order : 1 Unit Lead Time : 6 – 9 Days Port : Kualanamu International Airport Payment : Wise, Bank Transfer, Western union, Xoom, Moneygram & Worldremit Shipment : FedEx, DHL, UPS Product : 100% New original & Warranty Harisefendi is 100% safe, Because purchase products at Harisefendi provide a 100% money back guarantee. Site us : https://harisefendi.com/ Contact Purchase : order@harisefendi.com Phone/Whatsapp : +6281235792168

Minimum Order: 1 bags

Isobutyric Acid Product Technical Data Product Name: Isobutyric Acid Chemical Formula:C4H8O2 CAS Number: 79-31-2 Purity Grade: ≥ 99.5% Appearance: Colorless transparent liquid Smell: Characteristic pungent sour taste Key Physical and Chemical Properties Item Parameters Molecular Weight 88.11 g/mol Density (20°C) 0.95 g/cm³ Boiling Point 154-155°C Melting Point -47°C Flash Point 55°C (Closed Cup) Solubility Soluble in water, ethanol, ether Application Areas 1. Flavors and Food Additives Function: Synthetic edible flavors (such as isobutyric acid esters), giving fruit flavors (strawberry, pineapple, etc.) End Products: Beverages, candies, baked food flavors 2. Pesticide intermediates Key raw materials for synthetic herbicides (such as isobutyric acid) and fungicides 3. Pharmaceutical synthesis Organic synthetic building blocks for the preparation of anti-inflammatory drugs and antibiotics 4. Industrial solvents Environmentally friendly solvent substitutes for resin and coating production 5. Animal feed preservatives Inhibit mold growth and extend feed storage period Packaging and storage specifications Packaging form Specifications Transport mark Galvanized iron drum 200 kg/barrel Corrosive liquid (Class 8) IBC ton barrel 1000 kg/barrel UN 2529, PG III ISO TANK 20,000 L Anti-static grounding device required Storage conditions Cool and ventilated warehouse, temperature ≤30°C Avoid oxidants and alkaline substances Sealed storage, avoid contact with metals other than stainless steel Quality control standards Implementation standard: GB/T 24796-2022 (industrial grade) / FCC (food grade) Hazard warning: Corrosive: Contact with skin may cause chemical burns (wear acid-resistant gloves/goggles) Flammability: Steam mixed with air may form an explosive mixture Leakage treatment: Cover with inert adsorbent material (sand) Collect in a dedicated waste acid container Rinse the contaminated area with sodium carbonate solution Customized service Special purity: 99.9% electronic grade (for semiconductor cleaning) is available Packaging customization: Support small sample bottles (1kg/5kg) or tank truck transportation Technical support: Free application compatibility test report

Minimum Order: 2 barrels

Cyanuric Acid (Isocyanuric Acid) Product Information Product Title Cyanuric Acid Alternative Names: Isocyanuric Acid; Cyanuric Acid; 1,3,5-Triazine-2,4,6- (1H,3H,5H)-trione; S-Triazine-2,4,6-triol; Isocyanuric Acid; 2,4,6-Tris(2'- hydroxy-4'-n-butoxypheny , l)-1,3,5-triazine; Symmetrical Trihydroxy Triazobenzene; 2,4,6-Trihydroxy-1,3,5-triazine English Name: Cyanuric Acid or Isocyanuric Acid (1,3,5-Triazine-2,4,6-triol, 2,4,6-Trihydroxy-s-triazine) Molecular Formula: C₃H₃N₃O₃ Applications Manufacturi , ng Derivatives: Mainly used for producing cyanuric acid bromides, chlorides, bromochlorides, iodochlorides, as well as their salts and esters. Synthetic Chemicals: Applied in synthesizing new-type bactericides, disinfectants, water treatment agents, bleaching agents, chlorinating agents, brominating agents, antioxidants, paint coatings, selective herbicides, and metal cyanidation moderators. Direct Applications: Serves as a chlorine stabilizer for swimming pools, flame retardant for nylon, plastics, and polyesters, cosmetic additives, and in the synthesis of special resins. Physical and Chemical Properties Appearance: White crystalline powder with whiteness ≥ 90. Thermal Property: Decomposes into cyanic acid and isocyanic acid at around 330°C. pH value of saturated solution ≥ 4.0. Hydration State: Crystals precipitated from water contain 2 molecules of crystal water, with a relative density of 1.768 (0°C); they effloresce and lose moisture in the air. Crystals precipitated from concentrated hydrochloric acid or sulfuric acid are anhydrous. Solubility: 1g dissolves in approximately 200ml of water. Odorless, slightly bitter taste. Tautomerism: Exists in the keto form (isocyanuric acid). Solvent Compatibility: Soluble in hot water, hot alcohol, pyridine, concentrated hydrochloric acid, and sulfuric acid without decomposition; also soluble in sodium hydroxide and potassium hydroxide aqueous solutions. Insoluble in cold alcohol, ether, acetone, benzene, and chloroform. Specifications and Models Moisture Content: Wet basis: Moisture 25-30% Dry basis: Moisture ≤ 0.5% (available in powder, granules, and tablets) Production Process Types: Cyanuric acid produced with urea and ammonium chloride as additives Cyanuric acid directly produced from urea Quality Indicators Item Index Cyanuric Acid Content ≥ 98.5% Water Insoluble Matter ≤ 0.25% Ash Content ≤ 0.35% pH Value (Saturated Solution) ≥ 4.0 Packaging Packed in plastic woven bags with inner plastic liners, net weight 25kg or 50kg per bag. Customized packaging solutions are available according to customer requirements. If you are interested in our products, please contact: Bill Zhang Sales Director SHANDONG SUMCHEMICALS CO., LTD. Mobile/ WhatsApp: +86 156 6271 5985 QQ: 3267823033 Wechat: billzhang5985 E-mail: bill@sumsupply.com E-mail: billzhangsales@gmail.com

Minimum Order: 2 barrels