Female NPT Rexroth Bosch Directional Control Valve DBDH6P1A 200

Overflow valve description

Relief valve, also known as return valve, is a hydraulic pressure control valve.Relief valves are divided into two categories: spring type and rod type. In addition, there are impulse type safety valve, pilot type safety valve, safety switch valve, safety decompression valve, deadweight safety valve and so on. The relief valve is the overflow through the valve port to adjust the working pressure of the system or limit its maximum working pressure to prevent the system from overloading. In the assembly or use of the relief valve, due to the damage of the O-ring seal, the combination seal ring, or the loosening of the installation screw and pipe joint, it may cause undue external leakage.

Recommend

The following are the general rules for safety valve selection.

(1) E-class steam boilers generally use deadweight safety valves.

(2) Large caliber, large displacement and high pressure systems generally use pulse type safety valves, such as temperature and pressure reduction devices, power station boilers, etc.

(3) Built-in safety valves are generally used for transporting liquefied gas train tankers, automobile tankers, storage tanks, etc.

(4) The top of the oil tank generally uses a hydraulic safety valve, which needs to be used in conjunction with the breathing valve.

(5) Pilot operated safety valve is generally used for underground drainage or natural gas pipelines.

(6) A safety return valve is generally used on the liquid phase return pipeline at the outlet of the tank pump of the liquefied petroleum gas station.

(7) Negative pressure or the system that may produce negative pressure during operation generally uses a vacuum negative pressure safety valve.

(8) The back pressure fluctuation is large and toxic flammable containers or pipeline systems are generally used bellows safety valves.

FAQ

Q1: Wonder if you accept small orders?
A1: Do not worry. Feel free to contact us .in order to get more orders and give our clients more convener ,we accept small order.

Q2: Can you send products to my country?
A2: Sure, we can. If you do not have your own ship forwarder, we can help you.

Q3: What's your payment terms ?
A3: By T/T,LC AT SIGHT,100% full payment.

Q4: How long is your production lead time?
A4:It depends on product and order qty. Normally, it takes us 15 days for an order with MOQ qty.

Q5: When can I get the quotation ?
A5: We usually quote you within 24 hours after we get your inquiry. If you are very urgent to get the quotation.Please call us or tell us in your mail, so that we could regard your inquiry priority.

Fujian Zhichuan Mechanical Equipment Co., Ltd. is a company specializing in the import of electronic hydraulic products trade and sales.Our aim is to provide our customers with high quality imported machinery products andexcellent after-sales service. Our main business covers the fields of construction machinery,photovoltaic equipment, vacuum equipment, mining equipment and metallurgical and automo-tive equipment industries, providing various types of power equipment, electromechanicalproducts, assemblies and components. We sell hydraulic components of well-known brands athome and abroad and sell and design hydraulic cylinders, hydraulic complete systems, customhydraulic systems and renovation projects.

Our products are widely used in major domestic petroleum machinery plants, oil fields. mines, smelters, engineering machinery plants, shipbuilding plants, heavy vehicle manufactur-ing plants and other enterprises and research institutes. Meanwhile, in the field of mining equipment, we have rich experience and advantages and can provide customers with mining equip-ment, mining drilling rigs and accessories, open pit mining equipment, crushing equipment,grinding equipment, ore dressing equipment feeding equipment, conveying equipment, screen-ing equipment lifting storage and transportation equipment, complete sets of safety protectionand monitoring equipment for mining machinery, etc.

In the field of construction machinery, our products such as crawler excavation machinery. wheeled excavation machinery, loading machinery, earth-moving machinery, lifting machinery,industrial vehicles, compaction machinery, heavy vehicles, amphibious vehicles and somehydraulic packages for special vehicles are also widely recognized by our customers. in addi-tion, we also provide tunnel construction sets, pneumatic tools, military construction machinery and other products.

As a professional imported machinery products company, we focus on product quality andservice, and have gathered a group of highly qualified technicians and maintenance personnelwho are able to provide professional technical support and maintenance services to ourcustomers. We implement network sales of stock products through cooperation with distributorsaround the world, and it is our development direction and goal to establish a mutual trust, stableand long-lasting relationship. At the same time, we pursue the principle of following the rulesand cooperating with each other in good faith.