Coliter ® Brass Pressure Reducing Valve – Adjustable 0.15–0.5MPa

Coliter® offers a complete range of pressure reducing valves (PRVs) to stabilize downstream water pressure in residential, commercial, and municipal pipelines. Our series includes the JY1001 brass direct-acting PRV—ideal for homes and small buildings with compact installation—and the JY200X pilot-operated PRV made of epoxy-coated ductile iron for high-flow, high-stability applications like high-rise buildings and district networks. Both types maintain constant outlet pressure despite inlet fluctuations, feature adjustable set points, optional pressure gauges, and comply with GB/T 22130 standards. Designed for silent operation, corrosion resistance, and long service life—backed by ISO-certified manufacturing and global OEM support.

1. Precautions

Valves are pipeline components designed to open or close circuits, control flow direction, and regulate parameters of the conveyed media (temperature, pressure, and flow rate). Based on their function, they are classified into shut-off valves, check valves, control valves, etc., serving purposes such as on/off switching, regulation, flow guidance, prevention of backflow, pressure stabilization, diversion, or overflow/pressure relief.

Users must correctly select, install, operate, and maintain the valves to ensure normal functionality and guarantee personal and property safety.

2. Valve Selection

When selecting the valve type, carefully review the product manual and make your choice based on the operating conditions and technical specifications. During normal operation, the working pressure must not exceed the valve's Nominal Pressure (PN), and the working temperature must remain within the range specified by the valve. Do not exceed the allowable limits.

3. Valve Installation

Installation must be performed by qualified professionals. After installation, pressure testing must be conducted in accordance with standard requirements. The valve shall only be put into service after successful commissioning.

Excessive misalignment deviation between the two pipeline ends is not permitted; otherwise, excessive installation stress will be generated, leading to failure or damage. The thread accuracy and effective length must strictly comply with ISO 228 standards.

When tightening, apply the wrench to the hexagonal or octagonal section on the same side as the threaded end. Do not apply force to the opposite side of the valve to avoid deformation. PTFE (Polytetrafluoroethylene) tape or thread sealant must be used for sealing.

Use the appropriate torque wrench or pipe wrench for installation and tightening. Tighten only to the effective thread length; do not over-tighten, as this may cause the thread to press against the internal end face, resulting in ball damage and leakage. To ensure normal operation, it is recommended to install a strainer at the pipeline inlet.

4. Operation, Maintenance and Service 

The handle or handwheel of the ball valve is designed based on the service conditions and corresponding torque requirements. Do not substitute it with an extended lever, as excessive operating torque may damage the valve. Additionally, an excessively high closing speed may cause a water hammer effect, resulting in a momentary pressure surge.

Frequent fluctuations in pipeline pressure or temperature will shorten the service life. Corresponding preventive measures should be designed into the system.

The stem sealing packing is made of PTFE (Polytetrafluoroethylene). In case of leakage due to corrosion, the packing can be compensated by tightening the gland nut. Note: The packing must only be replaced after the internal medium pressure has been relieved.

Gate Valves: High-Performance Flow Control Solutions from China’s Leading Manufacturer

Gate Valves are essential linear motion valves designed for on-off flow control in various industrial, commercial, and residential piping systems. As a core product line of Zhejiang Haoji Fluid Technology Co., Ltd.—a professional technology enterprise integrating R&D, design, manufacturing, sales, and trade—our Gate Valves are engineered to deliver reliable sealing, long service life, and excellent adaptability to diverse working conditions. Located in Yuhuan City, the “City of Valves in China,” we leverage decades of copper production experience and advanced manufacturing capabilities to create Gate Valves that meet global quality standards.

Our Gate Valves feature a simple yet robust structure, with a gate plate that moves vertically to open or close the flow channel. This design ensures minimal flow resistance when fully open, making them ideal for applications requiring unobstructed flow, such as water supply, sewage treatment, oil and gas transmission, heating systems, and chemical pipelines. We strictly control every production process, from material selection to final testing, to ensure each Gate Valve performs stably under different pressures and temperatures.

Quality is the cornerstone of Haoji’s development. All our Gate Valves are insured by China Ping An Insurance Company, providing additional peace of mind for our customers. We have passed ISO9001:2015 quality management system, ISO14001:2015 environmental management system, ISO18001:2007 occupational health and safety management system certification, as well as TS certification and health license approval for imported products involving drinking water safety. Our products also hold CQC, EU CE, BSCI, France ACS, Germany DAKKS and other testing certifications, ensuring compliance with international standards.

Equipped with advanced production equipment imported from Germany, Italy, and Taiwan, and supported by an international standard testing laboratory and a professional QC team, we guarantee the consistency and reliability of every Gate Valve. Our R&D team of more than 30 professionals continuously optimizes product design and manufacturing processes, integrating innovative technologies to meet the evolving needs of global customers. Adhering to our corporate mission of “letting innovative technology and high-end quality serve every family,” we are committed to becoming a leading brand in the global valve industry.

Whether you need standard or custom Gate Valves, Haoji Fluid Technology provides one-stop solutions with competitive prices and timely after-sales service. Contact us today to learn more about our Gate Valves and how we can create value for your business.

When it comes to full-port, bi-directional shut-off in water supply, HVAC, fire protection, or industrial piping systems, gate valves remain the gold standard—but only when built with precision, durable materials, and strict quality control.

At Zhejiang Haoji Fluid Technology Co., Ltd., we specialize in manufacturing a comprehensive range of gate valves that meet international performance and safety standards. Located in Yuhuan City—China’s renowned “Valve Capital”—our 30,000+ sqm factory produces over 50 models of gate valves, including:

• Brass Gate Valve – ideal for residential plumbing
• Flanged Gate Valve – for high-pressure pipelines
• Cast Steel Gate Valve and Stainless Steel Gate Valve – for corrosive or high-temperature environments
• Soft Sealing Gate Valve – zero-leakage with EPDM/NBR seat
• Hard Seal Gate Valve – metal-to-metal sealing for steam or abrasive media
• Rising Stem Soft Sealing Gate Valve and Rising Stem Hard Seal Gate Valve
• Non-Rising Stem Soft Sealing Gate Valve and Non-Rising Stem Hard Seal Gate Valve
• Lockable Gate Valve, Magnetic Lockable Gate Valve, and Brass Magnetic Lockable Gate Valve
• Magnetically Lockable Meter-Lead Gate Valve and Magnetically Lockable Union Gate Valve
• Brass Union Gate Valve, Mechanical Lockout Gate Valve, Maintenance Free Gate Valve, and Magnetic Gate Valve
• Specialty stainless steel models: Stainless Steel Soft Seal Flange Rising Stem Gate Valve, Stainless Steel Soft Seal Flange Non-Rising Stem Gate Valve, Stainless Steel Soft Seal Groove Gate Valve, and Stainless Steel Soft Seal Flange Densified Gate Valve

All products are engineered for drinking water safety, gas isolation, district heating, and industrial fluid control—backed by global certifications.

Why Global Buyers Trust Haoji Fluid for Gate Valves?

Certified Quality: Our gate valves comply with ISO 9001:2015, ISO 14001:2015, EU CE, France ACS (for potable water), Germany DAkkS, CQC, BSCI, and hold official Health License for Imported Drinking Water Products. Every valve is 100% pressure tested in our international-standard lab and insured by China Ping An Insurance.

Advanced Manufacturing: We use high-purity copper alloys and stainless steel, processed on equipment imported from Germany, Italy, and Taiwan. Our in-house QC team ensures consistent performance across all batches.

Custom Solutions: With over 30 R&D engineers, we support OEM/ODM projects—including custom threads (NPT/BSP), magnetic locking systems, laser marking, and special coatings.

Our Commitment to Excellence

Guided by our corporate mission—“Let innovative technology and high-end quality serve every family!”—we combine decades of copper valve expertise with modern engineering. Our core values include responsibility, integrity, innovation, passion, focus, persistence, service, and win-win partnership.

Vision: To become a leading brand in the global fluid control industry.

Contact Us Today

Whether you need standard brass gate valves or specialized stainless steel lockable models, Zhejiang Haoji Fluid offers competitive pricing, flexible MOQ, fast delivery, and full certification support. Reach out for product catalog, test reports, or samples!

Engineered in Yuhuan. Trusted worldwide.

As a leading gate valve manufacturer based in Yuhuan—China’s “Valve Capital”—Zhejiang Haoji Fluid Technology Co., Ltd. delivers high-performance fluid control solutions for global water, gas, HVAC, and industrial systems.

Our comprehensive gate valve portfolio includes:

• Soft Sealing Gate Valve: Features EPDM or NBR elastomer seats for bubble-tight shut-off in clean water applications. Ideal for residential and municipal use.
• Hard Seal Gate Valve: Metal-to-metal sealing design for high-temperature, high-pressure, or abrasive media such as steam, oil, and slurry.
• Rising Stem Soft Sealing Gate Valve: Visual stem indication for easy operation status monitoring; excellent for above-ground installations.
• Rising Stem Hard Seal Gate Valve: Combines durability with precise control in demanding industrial environments.
• Non-Rising Stem Soft Sealing Gate Valve: Compact design saves space—perfect for underground vaults or confined areas.
• Non-Rising Stem Hard Seal Gate Valve: Robust performance where stem exposure is undesirable.
• Brass Gate Valve: Made from high-purity HPb59-1 or CW617N brass; corrosion-resistant and lead-free compliant for potable water systems.
• Flanged Gate Valve: Designed with ANSI, DIN, or JIS flange standards for easy integration into pipeline networks.
• Cast Steel Gate Valve: Suitable for high-pressure applications up to PN40/Class 300, commonly used in power plants and refineries.

All products are manufactured in our 30,000+ sqm facility with over 300 employees, including 30+ R&D engineers. We utilize advanced equipment from Germany, Italy, and Taiwan, and operate an international-standard testing laboratory for 100% pressure and leakage validation.

Our gate valves are certified under ISO 9001:2015, ISO 14001:2015, CE, France ACS (drinking water safety), Germany DAkkS, CQC, BSCI, and hold official Health License for Imported Water-Contact Products. Every product is insured by China Ping An Insurance for quality assurance.

Guided by our mission—“Let innovative technology and high-end quality serve every family!”—Zhejiang Haoji Fluid combines decades of copper valve expertise with modern engineering to create long-term value for customers worldwide.

Contact us today for catalog, certification documents, or sample requests. OEM/ODM supported.

A gate valve is essential for full-bore, bi-directional shut-off in water supply, HVAC, fire protection, and industrial pipeline systems. At Zhejiang Haoji Fluid Technology Co., Ltd., we design and manufacture premium gate valves that deliver leak-tight performance, long service life, and global compliance.

Located in Yuhuan City—known as “China’s Valve Capital”—our 30,000+ sqm factory produces a wide range of gate valves, including:

• Brass Gate Valve (for residential and commercial plumbing)
• Stainless Steel Gate Valve (corrosion-resistant, ideal for food, pharma, and marine use)
• Cast Steel Gate Valve (for high-pressure industrial applications)
• Flanged Gate Valve (compatible with ANSI, DIN, JIS standards)
• Soft Sealing Gate Valve (EPDM/NBR seat for zero leakage in clean water)
• Hard Seal Gate Valve (metal-to-metal seal for steam, oil, or abrasive media)
• Rising Stem and Non-Rising Stem designs to suit above-ground or buried installations

Every gate valve undergoes rigorous testing in our in-house international-standard laboratory. We use precision casting and CNC machining equipment imported from Germany, Italy, and Taiwan to ensure micron-level accuracy and smooth operation.

Our gate valves are certified under:

• ISO 9001:2015 (Quality Management)
• ISO 14001:2015 (Environmental Management)
• EU CE Marking
• France ACS (for potable water safety)
• Germany DAkkS-accredited testing
• CQC, BSCI, TS Certification

We also hold the official Approval Document for Health License of Imported Products Involving Drinking Water Safety, and all products are insured by China Ping An Insurance—a strong guarantee of quality and reliability.

With over 30 R&D engineers and decades of copper valve manufacturing experience, Zhejiang Haoji Fluid supports OEM/ODM projects worldwide. Our mission is clear: “Let innovative technology and high-end quality serve every family!”

Contact us today for product catalog, certification copies, or sample requests. Engineered in China. Trusted globally.

The soft sealing gate valve is the preferred choice for clean water, HVAC, and residential plumbing systems where bubble-tight shut-off and smooth operation are critical. At Zhejiang Haoji Fluid Technology Co., Ltd., we specialize in high-precision soft seal gate valves engineered for reliability, safety, and long-term performance.

Our soft sealing gate valves feature:

• Elastomer seats made of EPDM or NBR for excellent sealing performance
• Full-port design ensuring minimal pressure drop
• Brass body (HPb59-1 or lead-free CW617N) for corrosion resistance and drinking water compliance
• Options for rising stem or non-rising stem configurations
• Threaded (BSP/NPT) or flanged end connections
• Magnetic lockable, union, or meter-lead variants available for utility applications

Manufactured in our 30,000+ sqm facility in Yuhuan—China’s “Valve Capital”—each valve undergoes 100% pressure and leakage testing in our international-standard laboratory equipped with German and Italian testing rigs.

All soft sealing gate valves from Haoji Fluid are certified to meet global standards, including:

• ISO 9001:2015 (Quality Management)
• ISO 14001:2015 (Environmental Management)
• EU CE Marking
• France ACS Certification (approved for contact with potable water)
• Germany DAkkS-accredited test reports
• CQC, BSCI, TS Certification

We also hold the official Approval Document for Health License of Imported Products Involving Drinking Water Safety, and every product is insured by China Ping An Insurance—a strong commitment to quality assurance.

With over 30 R&D engineers and decades of copper valve expertise, Zhejiang Haoji Fluid supports OEM/ODM projects worldwide. Our mission: “Let innovative technology and high-end quality serve every family!”

Contact us today for catalog, certification documents, or free samples of our soft sealing gate valves.