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This waterproof pen-type tester integrates pH, electrical conductivity (EC) and temperature measurement functions in one compact device, equipped with automatic 2-point calibration and automatic temperature compensation for stable and accurate water quality detection. Technical Specifications Item Parameter Model PH-86L Measuring RangepHECTemperature 0.00~14.0 pH0.00~19.9 mS/cm0~50℃ ResolutionpHECTemperature 0.1 pH0.1 mS/cm0.1℃ AccuracypHECTemperature ±0.1 pH±2% Full Scale (FS)±1℃ Automatic Temperature Compensation Range 0℃~50℃ Calibration Mode Automatic 2-point Calibration Power Supply 2 × 1.5V AAA Batteries Operating Temperature 0℃~50℃ Dimensions 210 × 40 × 25 mm Net Weight 100g

Minimum Order: 10 long tons

Product Overview The DO-66 portable dissolved oxygen analyzer is designed for convenient on-site testing. It consists of two core parts: sensor and electronic control unit. The sensor adopts membrane dissolved oxygen electrode; the electronic unit integrates operational amplifier and microcontroller chip, equipped with automatic temperature compensation function. Core Advantages Portable Design Compact and lightweight body. Equipped with PP engineering plastic carrying case for easy outdoor transport and storage, sturdy and durable. Long Battery Life Powered by 2 AAA batteries, supporting up to 600 hours of continuous operation. Low battery reminder function: the screen will pop up warning when power is nearly exhausted to remind users to replace batteries timely. Waterproof Construction Full body waterproof except battery compartment to fully protect internal circuits. Dual-Point Auto Calibration Independent calibration keys for 0% and 100% saturation, simple and fast calibration operation. Automatic Temperature Compensation Automatically identify and convert readings to compensate deviation between actual sample temperature and standard temperature, ensuring precise measurement data. Technical Specifications Item Parameters Model DO-66 Measuring RangeDissolved OxygenTemperature 0~199.9% saturation, 0~16.50 mg/L0~50℃ (32~122℉) ResolutionDissolved OxygenTemperature 0.1% saturation, 0.01 mg/L0.1℃ AccuracyDissolved OxygenTemperature ±1.5% Full Scale (F.S)±1℃ (±33.8℉) Residual Current Reading does not return to zero when ≤0.15 mg/L Response Time ≤15 seconds Temperature Compensation Range 0℃~50℃ Power Supply 2 × AAA batteries Sample Operating Temperature 0℃~50℃ Overall Dimensions 207mm × 32mm × 36mm Net Weight 85g (batteries excluded)

Minimum Order: 10 long tons

This economical microprocessor-based handheld meter is equipped with a large customized LCD screen, delivering clear and easy-to-read readings. The DO-510 supports dual measurement modes: dissolved oxygen concentration (mg/L) and oxygen saturation percentage. Built-in temperature compensation ensures accurate dissolved oxygen test results. Item Parameter Model DO-510 Measuring Range 0.00~19.99 mg/L, 0.0~255.0% saturation Resolution 0.01 mg/L, 0.1% Accuracy ±1.5% Full Scale (F.S) Temperature Compensation Range 0~50℃ Power Supply 9V battery Overall Dimensions 123mm×72mm×33mm

Minimum Order: 10 long tons

The KL-188 sodium ion concentration tester is professionally designed to detect sodium ion (Na⁺) content in aqueous solutions. It is widely adopted for high- purity water quality monitoring in power plants, applicable to steam, condensed water, boiler feed water, boiler circulating water and natural water. This instrument is composed of full-integrated circuit high-impedance millivoltmeter and matched PNa combination electrode. When the PNa electrode is immersed in liquid sample, potential signal generated according to sodium ion activity will be transmitted to the electric meter. The screen directly displays PNa value, and users can check corresponding sodium ion concentration via conversion table. Key Technical Parameters Measuring Range Electric meter section: PNa 0~9; Na⁺ 23g/L ~ 0.023μg/L Complete set measurement (subject to electrode performance): PNa 1~7; Na⁺ 2.3g/L ~ 2.3μg/L Resolution: 0.01 PNa Accuracy Meter individual: ≤ ±0.02 PNa / 3 PNa Full set with electrode: ±0.05 PNa ± 1 digit Stability: 0.02 PNa within 24 hours Alarm Precision for Upper & Lower Limit: 0.02 PNa Analog Output: 4~20mA standard industrial signal Calibration Support: Single-point calibration & two-point calibration Display Mode: 4-digit LED digital display Power Supply: AC 220V ±10%, 50Hz ±2% Working Environment: Ambient temperature 5~50℃, relative humidity below 85%

Minimum Order: 10 long tons

The KL-188 sodium ion concentration meter is designed to measure sodium ion (Na⁺) content in aqueous solutions. It is especially suitable for quality monitoring of high-purity water in power plants, such as steam, condensed water, boiler feed water, and also applicable to boiler water, natural water and other water samples. This instrument consists of a full-integrated high-impedance millivoltmeter and a PNa combination electrode. When the PNa electrode is immersed in the test solution, a specific potential is generated, which depends on the activity of sodium ions. After the potential signal is transmitted to the millivoltmeter, the PNa value can be directly displayed on the meter, and the corresponding Na⁺ concentration can be checked via the conversion table. Technical SpecificationsItem Parameters Measuring Range1. Millivoltmeter section2. Full set measurement (depends on electrode performance) 1. PNa: 0~9; Na⁺: 23g/L ~ 0.023μg/L2. PNa: 1~7; Na⁺: 2.3g/L ~ 2.3μg/L Resolution 0.01 PNa Accuracy1. Meter only2. Complete set with electrode 1. ≤ ±0.02 PNa / 3 PNa2. ±0.05 PNa ± 1 digit Stability 0.02 PNa per 24 hours Upper & Lower Limit Alarm Accuracy 0.02 PNa Analog Output Current 4~20mA Calibration Mode Single-point calibration & two-point calibration Display 4-digit LED display Power Supply AC 220V ±10%, 50Hz ±2% Operating Environment Ambient temperature: 5~50℃; Relative humidity: ＜85%

Minimum Order: 1 bags

Hard Sealed Gate Valve Flanged Hard Seal Gate Valve for Water Supply & Municipal Pipeline in demanding pipeline systems. Our valves feature a hard metal-to-metal seal, ensuring excellent durability, wear resistance, and long service life, even under high-pressure, high-temperature, or abrasive conditions. We offer a full range of Flanged Metal Seated Gate Valves suitable for municipal water supply, building pipelines, fire protection systems, and industrial applications. Every valve is produced in our ISO9001-certified factory in Hebei, China, combining advanced manufacturing equipment, strict quality control, and professional engineering support.   Key Features ·   Metal-to-Metal Hard Seal: Provides exceptional sealing performance, reduces leakage risk, and extends service life. ·   Flanged Ends: Easy and secure installation with standard flanges, ideal for municipal pipelines and water supply systems. ·   High Durability: Resistant to corrosion, abrasion, and extreme working conditions. ·   Wide Application: Suitable for water supply, municipal pipelines, fire protection, heating and cooling systems, and industrial projects. ·   Customizable Solutions: OEM/ODM support available, including custom dimensions, pressure ratings, and material selections.   Applications ·   Flanged Hard Seal Gate Valve for Water Supply ·   Flanged Hard Seal Gate Valve for Municipal Pipeline ·   Building water supply and drainage ·   Fire protection water systems ·   Heating and cooling circuits ·   Industrial water treatment and wastewater systems   Product Standard Chinese standard; German F4/F5 standard; British standard 5163   Technical Specification Size range: DN50–DN600 Pressure class: PN10/PN16/PN25 Temperature range: 0℃–80℃   Main Material Valve body: Ductile iron (epoxy coated) Valve stem: Stainless steel (SS304) Seal: EPDM + Brass   Why Choose Zhengjia Valve At Zhengjia Valve, we integrate R&D, manufacturing, and sales to deliver reliable valves for global clients. Our products are exported worldwide, and we provide technical support and custom solutions for your projects. Trust Zhengjia Valve for durable, high-performance ductile Iron gate valves that keep your pipeline systems safe and efficient.

Non-rising Stem Cap Resilient Seated Gate Valve Non-Rising Stem Cap Resilient Seated Gate Valve Manufacturer Underground Soft Seal Gate Valve The Non-Rising Stem Cap Resilient Seated Gate Valve is specially designed for water supply and distribution systems, offering reliable shut-off performance in underground or space-limited installations. Featuring a non-rising stem structure, the valve keeps a constant height during operation, making it ideal for buried pipelines. The wedge is fully encapsulated with resilient rubber (EPDM), ensuring bubble-tight sealing, corrosion resistance, and long service life. As a professional Municipal Pipeline Gate Valves Manufacturer, we provide valves that combine stable quality, easy installation, and cost-effective performance for municipal and industrial projects.   Key Features & Advantages ·   Non-Rising Stem Design (NRS Type): Stem does not move vertically, perfect for underground systems and compact spaces ·   Resilient Soft Sealing Structure: Fully rubber-coated wedge ensures zero leakage and long-term sealing reliability ·   Corrosion-Resistant Construction: Epoxy-coated ductile iron body provides excellent protection against rust and harsh environments ·   Low Torque Operation: Smooth opening and closing reduce operational effort and improve efficiency ·   Full Bore Flow Design: Minimizes pressure loss and prevents clogging in water systems Applications This Resilient Seated Gate Valve is widely used in: Municipal water supply networks Underground pipeline systems Irrigation and drainage projects Fire protection systems Wastewater treatment plants   Why Choose Our Resilient Seated Gate Valve Choosing our valve means reducing your project risk and ensuring long-term reliability. We provide strict quality control with full pressure and sealing tests before delivery, ensuring every valve performs consistently in real applications. The use of durable ductile iron, stainless steel stem, and EPDM sealing helps minimize leakage and maintenance costs over time. With standardized flange compatibility and flexible customization options, our valves can be easily integrated into different systems. As a direct manufacturer, we offer competitive pricing, stable delivery, and fast technical support, making us a reliable long-term partner for your projects.   FAQ Q: What is the advantage of a non-rising stem gate valve? A: It saves installation space and is ideal for underground pipelines where vertical movement is limited. Q: Is this valve suitable for buried installation? A: Yes, it is specifically designed for underground and water distribution systems. Q: How do you ensure sealing performance? A: Each valve is tested for pressure and leakage before shipment to ensure reliable sealing.   If you would like more information about this product, please feel free to contact us. Recommend other popular products for you.: Municipal Pipeline Gate Valves Manufacturer

Rising Stem Resilient Seated Gate Valve Rising Stem Resilient Seated Gate Valve Manufacturer Flanged Soft Sealing Gate Valve The Rising Stem Resilient Seated Gate Valve is designed for reliable shut-off in water supply, fire protection, and industrial pipeline systems. Featuring a fully rubber-encapsulated wedge, this valve ensures bubble-tight sealing, corrosion resistance, and long-term durability. The wedge is fully encapsulated with resilient rubber, ensuring a tight seal, reliable performance, and long service life. Compared with traditional metal seated valves, this design provides zero leakage performance and low torque operation, making it an ideal solution for municipal and potable water systems. As a professional Resilient Seated Gate Valve Manufacturer, Zhengjia Valve offers high-quality valves with international standards and global export experience. Key Features & Advantages Resilient Soft Sealing The gate is fully encapsulated with elastic rubber, allowing slight deformation to achieve tight sealing and eliminate leakage Rising Stem Design Visible stem movement provides clear open/close indication, ideal for above- ground installations and fire systems Full Bore Flow Passage Smooth internal channel reduces pressure loss and prevents debris accumulation Corrosion Resistance with Epoxy Coating Fusion bonded epoxy coating protects both internal and external surfaces, extending service life Low Torque & Easy Operation Elastic sealing reduces friction, ensuring smooth operation even in large-size valves Maintenance-Friendly Design Multiple O-ring stem sealing system reduces leakage and allows long-term maintenance-free operation   Applications This Flanged Resilient Seated Gate Valve is widely used in: Municipal water supply systems Fire protection pipelines Wastewater treatment plants Irrigation and drainage systems HVAC and cooling systems Industrial fluid control pipelines The resilient sealing structure ensures reliable shut-off even in demanding environments.   Why Choose Our Resilient Seated Gate Valve Choosing our Pipeline Gate Valve means choosing a product that reduces your project risk while improving long-term cost efficiency. We ensure consistent quality through strict ISO9001 control and full testing before delivery, so you receive valves that perform reliably in real conditions—not just on paper. Our durable materials and resilient sealing design minimize leakage and maintenance, helping you lower lifecycle costs. With standard flanged compatibility (DIN/ANSI/BS) and flexible OEM customization, our valves can be easily integrated into your system without modification. As a direct manufacturer, we provide competitive pricing, stable lead time, and fast technical support, making us a dependable partner for long-term supply, not just a one-time vendor. If you would like more information about this product, please feel free to contact us. Recommend other popular products for you.: Municipal Pipeline Gate Valves Manufacturer

Flanged Hard-Seal Gate Valve Metal Seated Gate Valve for High Pressure & Temperature Flanged Gate Valve Supplier   The Flanged Hard Seal Gate Valve is a heavy-duty industrial valve designed for reliable shut-off in high-pressure and high-temperature pipeline systems. Featuring a metal-to-metal sealing structure, this valve ensures excellent durability, wear resistance, and long service life in demanding environments.   With a full bore design and flanged connection, it provides low flow resistance and stable sealing performance, making it ideal for water, oil, gas, steam, and industrial fluid control systems. Standards & Certifications   Our gate valves are manufactured in compliance with international standards: ·   Design Standard: API 600 / GB/T 12234 ·   Face to Face: GB/T 12221 / EN 558 ·   Flange Standard: ANSI B16.5 / DIN / BS ·   Test & Inspection: API 598 / GB/T 13927   Product Features and Advantages   ·   Pressure and wear resistant, adaptable to harsh working conditions : The metal-to-metal sealing structure is wear resistant, high temperature resistant, and high pressure resistant, making it suitable for oil, gas, steam, corrosive media, etc. ·   Long service life and reliable sealing : Even after long-term operation, the metal sealing surface wears slowly and can still maintain good sealing and pressure resistance. ·   Wide range of pipe diameters and pressure ratings : capable of producing pipes from small diameters to large diameters, and multiple pressure ratings (PN/Class) to meet various industrial design requirements. ·   Compatible with a variety of materials and standards : carbon steel, stainless steel, alloy steel, ductile iron and other materials are available, and it supports DIN / ANSI / API / GB and other standards.   Size Specifications and Standards   ·   A wide range of specifications are available, from small DN 50–100 to large DN 600+, all customizable. ·   Pressure ratings cover PN10 / PN16 / PN25 / higher (depending on material and structural design). ·   Flange connections meet international standards such as ANSI, DIN, BS, and API , and are compatible with international projects.   Functions and Applications   Hard-seal gate valves are mainly used in: oil and gas pipelines, petrochemical plants, high-pressure steam systems, industrial chemical pipelines, high- temperature and high-pressure systems, power plant steam pipelines, heavy industrial conveying systems, and other scenarios. They are particularly suitable for systems requiring high pressure, high temperature, wear resistance, corrosion resistance, and long-term stable operation.

Flanged Soft-Seal Gate Valve Flanged Soft Seal Gate Valve for Municipal Pipeline   The Flanged Soft-Seal Gate Valve is designed for reliable isolation in pipeline systems that require excellent sealing performance, low flow resistance, and stable operation. Its soft-seal structure typically uses elastic sealing materials such as EPDM or NBR, allowing the valve disc to fit tightly with the seat and achieve near-zero leakage after closing. In the open position, the full-bore flow path helps minimize pressure loss and supports efficient fluid transmission.   Product Features and Advantages   ·  Excellent sealing performance and zero leakage : The combination of valve disc and soft sealing seat can achieve elastic sealing, and there is almost zero leakage after closing. ·  Full-bore design / Low flow resistance : When opened, there is no obstruction inside the valve, the flow path is directly connected to the pipeline, and the pressure loss is minimal. ·  Anti-corrosion coating/corrosion resistance : An epoxy anti-corrosion coating can be sprayed on the inside and outside of the gate valve body to improve corrosion resistance and service life. ·  Suitable for a variety of media : tap water, neutral liquids, low- pressure steam, etc., applicable to municipal water supply, building water supply and drainage, HVAC systems, industrial clean water systems, etc. ·  Simple installation and maintenance : Traditional handwheel operation, mature and stable structure, suitable for general engineering projects.   Size Specifications and Standards   ·  Nominal diameter: DN50–DN600 (2"–24") is the standard range. ·  Pressure rating: PN16 (PN10/PN25 can be customized for some applications) . ·  Standards: Flanges and boreholes conform to BS EN 1092-2 , valve body structure and dimensions conform to BS 5163 / BS EN 558-1 , and pressure testing conforms to BS EN 12266-2003 .

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Minimum Order: 1 bags

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Minimum Order: 10 long tons