Spring-Loaded Pressure Relief Valves

Our Spring-Loaded Pressure Relief Valves have the nozzle screwed directly into the body, allowing for easy maintenance. The use of high-quality materials such as Super-Duplex Alloys, Alloy 625, etc. also ensures robust operation.

Free Quote For Spring-Loaded Pressure Relief Valves

Spring-Loaded Pressure Relief Valves

Technical Data

Temperature range
-268°C~+720°C
Size
1"D2" ~ 8"T10"(EN Classes DN25 ~ DN200)
Pressure
150lb ~ 2500lb (EN Classes PN16 ~ PN400)
The allowable tolerance of the set pressure
≤±3% of the set pressure
Overpressure
≤10% of the set pressure
Blowdown
≤10% of the set pressure
Tightness
The valves have good seat tightness, conforms to APl527
Materials
Carbon Steel, Austenitic & Martensitic Stainless Steels, Duplex & Super-duplex Alloys, 6Mo, Alloy 400, Alloys B & C, Alloy 625 & 825.

Features

  • The solid nozzle screws into the body, allowing for easy maintenance.
  • The shape of the disc holder has been designed to enhance the effect of the fluid thrust for an instant lift of the disc. Blowdown control is provided with an adjustable nozzle ring only.
  • The combination of high-quality materials and adequate clearance between the disc holder, guide spindle and adjusting screw ensures that the disc lifts successfully.
  • The surface of both the disc and the nozzle seat are deposited with Stellite. Precision machining and lapping allows for excellent flatness and surface finish for the seating, ensuring that the safety valve has a high degree of seat tightness and a long use life.
  • The bellows of the safety valves can not only allow the valve to avoid the effects of variable back pressure, but can also protect the spring and other trim components from corrosive media.
  • The materials used in construction are strictly and carefully chosen, with the bellows and spring in particular following a strict manufacturing process, ensuring thorough and rigorous testing.

Application

Air, gas, steam, vapor, liquids and two-phase fluids

Quick Form

CAPTCHA image

This helps us prevent spam, thank you.

Protect Your Systems with Premium Safety Valves

We deliver cutting-edge safety valves meticulously engineered to prevent dangerous overpressure scenarios and ensure uninterrupted operation in a wide array of industries. Our state-of-the-art solutions, crafted from durable materials and backed by rigorous testing, are designed to excel under extreme conditions—ranging from high-temperature processes to highly corrosive environments. With robust, reliable performance at their core, these valves provide peace of mind, minimize the risk of costly downtime, and safeguard both your personnel and critical equipment. Whether you operate a chemical processing plant, an oil refinery, or a power generation facility, our expert team is committed to customizing solutions that meet your specific needs. Ready to optimize your operations? Contact us today for a free quote or to learn more about our comprehensive valve solutions.

Request a Quote

Our Products

Spring-Loaded Pressure Relief Valves

Our Spring-Loaded Pressure Relief Valves have the nozzle screwed directly into the body, allowing for easy maintenance. The use of high-quality materials such as Super-Duplex Alloys, Alloy 625, etc. also ensures robust operation.

More Details >

Spring-Loaded Pressure Relief Valves

Pilot-Operated Pressure Relief Valves

Luofu pilot-operated pressure relief valves deliver advanced, reliable, and efficient solutions for overpressure protection.

More Details >

Pilot-Operated Pressure Relief Valves

Changeover Valves

The Changeover Valve is an independently developed product by our company, designed based on the structure of similar overseas products and tailored to meet domestic service conditions. (Patent No.: ZL 2011 2 0434286.6)

More Details >

Changeover Valves

Small-Orifice Pressure Relief Valves

Compact and affordable, our Small-Orifice Pressure Relief Valves are available with various connection forms such as flanges or pipe threads.

More Details >

Small-Orifice Pressure Relief Valves

High-Performance Steam-Service Pressure Relief Valves

These valves are specifically designed for saturated and superheated steam services on power boilers, superheaters, reheaters and other similar applications.

More Details >

High-Performance Steam-Service Pressure Relief Valves

Pressure Relief Valves with Jacket

Used in situations where crystallizing is common and the viscosity is high, our jacketed versions of PSVs allow the body’s inlet and outlet body to be covered in a way that allows hot mediums to flow through the created space.

More Details >

Pressure Relief Valves with Jacket

Lined Pressure Relief Valves

Fluorine-lined pressure relief valves are a technically reliable and cost-effective alternative to conventional pressure relief valves made of nickel-based materials. Our model in particular has broad chemical resistance, ensuring protection against corrosion.

More Details >

Lined Pressure Relief Valves

Ensure Safe Operations with High-Performance Safety Valves

We engineer state-of-the-art safety valves to protect your systems from hazardous overpressure conditions and maintain continuous productivity. Whether you operate industrial pipelines, petrochemical facilities, or power generation plants, our advanced designs and premium materials deliver dependable performance—even in the toughest environments. Built with a keen focus on quality, safety, and compliance, our valves minimize downtime, reduce maintenance expenses, and safeguard valuable equipment from unexpected pressure spikes. Ready to secure your operations? Contact us today for a free quote or to learn more about our comprehensive valve solutions.

Request a Quote

Workflow

0

Reportable Health and Safety Incidents

40+

Years of Industry Expertise

1,000+

(Sets) Production and Inspection Equipment

100,000+

(Sets) Pressure Relief Valves Produced Annually

Why Us

We only provide high-quality safety valve products.

Advanced Technology

The company continuously innovates to improve valve performance, incorporating advanced materials and coatings to enhance durability and corrosion resistance, meanwhile, our facilities are equipped with advanced R&D labs and precision manufacturing tools.

Reasonable Price

Efficient assembly line production allows us to provide reasonable prices.

High-quality Raw Materials

Using high-quality raw materials can effectively improve the service life of the labeling product.

Experienced Engineers

Over 40 years of experience has granted our engineering and design team the insight to come up with rugged, quality products to meet our customer’s every need.

Advanced Equipment

The company utilizes modern manufacturing equipment, including CNC machines and advanced testing facilities. It has a full- performance testing device capable of handling valves with a maximum diameter of DN250 and a maximum pressure of 10MPa. Our 65,000 sqm ASME-certified facility in Zhejiang utilizes CNC machining, automated assembly lines, and robotic welding to ensure micron-level accuracy

Strict Quality Control

Luofu Valve Group maintains strict quality control standards, with certifications such as CE, ISO 9001, and ASME “UV” certification.

Just In Time

We also guarantee timely delivery and can offer a project management approach to ensure customer satisfaction.

Good Service

Luofu Valve Group offers customized solutions to meet specific customer requirements, working closely with clients to design and manufacture valves tailored to their needs and can provide timely support to customers around the world.

Warranty Service

Our company provides comprehensive after- sales services, including free on- site technical guidance, installation, and commissioning.

Reviews

As a petrochemical product manufacturer, CNOOC Oil & Gas (Taizhou) Petrochemical Co., Ltd. is committed to ensuring the continuity and stability of production and operation of each unit. In order to ensure the annual production target, under the correct leadership of our company's leaders, all staff have carefully organized and worked hard. The company's production work is being carried out in an orderly manner according to the plan, and the four major controls are fully controllable. Your company made outstanding contributions to us in the supply in the fourth quarter of 2017, which reflects the good strategic partnership between your company and CNOOC Oil & Gas (Taizhou) Petrochemical Co., Ltd. Here, we would like to express our sincere gratitude to the leaders and relevant staff of your company for their strong support.

From CNOOC Oil & Gas (Taizhou) Petrochemical Co., Ltd.

CNOOC Oil & Gas (Taizhou) Petrochemical Co., Ltd.

Luofu is trustworthy in terms of product quality, price, delivery time and after-sales service.

From PetroChina Guangxi Petrochemical Company

PetroChina Guangxi Petrochemical Company

Our company is the EPC contractor of 476 system unit safety valves for the ZhongKe (Guangdong) Refinery & Petrochemical Company limited Refining and Chemical Integration Project. We use the safety valve products of Luofu Valve Group Co., Ltd. After quality inspection, they are stable and run well.

From Sinopec Luoyang Engineering Co., Ltd.

Sinopec Luoyang Engineering Co., Ltd.

Thank you Luofu Valve for your cooperation all the time! You have given us all-round support in safety valve technology selection and pre-sales service.

From Moon Environment Technology Co., Ltd.

Moon Environment Technology Co., Ltd.

As an OEM supplier, your company always puts product quality and innovation at the top of the enterprise development, which is impressive. The Safety Valve and Changeover Valve Lockable Combination used on our company's compressors are of reliable quality and timely delivery!

From ShenGu Group

ShenGu Group

Contact Us

LUOFU VALVE GROUP., LTD

Address: Dong’ou Industrial Zone, Oubei Town, Yongjia County, Zhejiang Province, China

Zip Code: 325105

Office Hour: 9:00 – 18:00 Beijing Time, Mon-Fri

Email

ChinaPSV.com Logo
Get A Free Quote