Polyurethane Valve Seal

To lose a large amount of money in the Hydraulic Flow Control Valve, AAK used a small amount of money to ease the worries of Brazilian customer

Bernardo comes from a hydraulic winch manufacturer in Brazil, and has cooperated with AAK several times on non-standard customized hydraulic cartridge valves. At the beginning of last year, Bernard company needed to purchase hydraulic flow control valves for a batch of hydraulic winches. Due to cost pressure, the boss asked Bernard to reduce the procurement cost of hydraulic flow control valves by 10%. This hydraulic flow control valve needs to be the same as HydraForce standard part. After a round of sourcing, Bernard determined the manufacturer of the hydraulic flow control valve. 7 months after the sale of the hydraulic winch, a customer complained that the sealing ring of the hydraulic flow control valve was broken, resulting in leakage, which caused the hydraulic winch to rise powerlessly. 6 months after the original manufacturer replaced the sealing ring with new one, the old problem happened again. The customer complained directly to the boss, who asked Bernard to replace all the hydraulic flow control valves within 1 month and asked the original manufacturer to bear the costs. However, the original manufacturer could not reach an agreement. Bernard was caught in the middle. He was embarrassed for 2 weeks and made no progress. The boss was very disappointed with him.

Bernard sent me an email asking about the time and cost of re producing the hydraulic flow control valves. He wanted to pay for it himself. According to the hydraulic flow control valve drawings he sent, I realized that maybe only replacing with durable O-ring could solve his embarrassment. I sent him 10 O-rings for matching tests. A week later, Bernard told me that AAK O-rings could be matched with the original manufacturer's hydraulic flow control valves. He asked me to send 500 O-rings to Brazil as soon as possible, and he could finally have a good sleep.

Last week, Bernard sent an e-mail to express his thanks. All these hydraulic flow control valves have been assembled with AAK O-rings. It has been more than a year, and there has been no complaint of leakage caused by the rupture of the sealing ring of the hydraulic flow control valves. The boss also praised him for solving big losses with small money.

AAK's O-ring has 3 strengths: no sloughing, no extrusion and wear resistance. The material and structure of the seal ring directly affect the performance of the seal ring. The hardness, extrusion resistance, tensile strength and deformation of the material all determine the service life of the seal ring, and the structure of the seal ring also determines the sealing effect. AAK selects Japan's special PU polyurethane rubber sealing ring, and the lip compression of the sealing ring is strictly controlled between 15% ~ 20%.

Crown Rubber & Plastic Products manufactures high-performance butterfly valve seals designed to effectively seal all key leakage pointsâ??pipe sealing areas, operating shafts, flanges, flap valves, and disk valves.

We offer in-house tooling and rapid production to meet custom requirements with minimal lead time.

Our seals provide high sealing efficiency with low torque operation and are available in sizes ranging from 25 mm to 950 mm.

Depending on application needs, materials include Natural Rubber, EPDM, Nitrile, Neoprene, Silicone, FKM, and Viton.

Pressure Seal Bonnet Gate Valve

Pressure Seal Bonnet Globe Valve

Pressure Seal Cover Swing Check Valve

Model: N.V./SS304

Type: Needle Valve (FXF Female x Female)

Size: 1/2" BSP (FXF)

Working Pressure: 6000 PSI

Material: SS304 Stainless Steel

Thread Standard: BSP (British Standard Pipe)

Temperature Rating: -20C to 180C (typical for SS304 with PTFE seals)

Dear Friend,
How are you? Our company has been operating in the auto parts industry for 24 years, supplying a wide range of high-quality products to customers worldwide. Our main products include engine bearing, piston ring, piston, oil pump, water pump, gasket, valves, and we can also supply other parts upon customer request. We pride ourselves on providing exceptional customer service and competitive prices. We understand the importance of quality control and ensuring that our products meet the highest standards. We have a team of experienced professionals who oversee the production process and ensure that each and every part meets the specifications and requirements of our customers.


Thank you! We look forward to hearing from you soon.



Best regards,

* The Pressure Seal Bonnet Gate Valve is exceptionally sturdy, rugged, and durable, with a reputation for quality, integrity, and long service.

* They are designed for tight sealing and ease of operation. The valves are available flanged & butt-weld ends in pressure rating from ASME Class 150 to Class 2500, and in a variety of materials of construction.

* Gate Valves are of flexible wedge design, outside screw and yoke, and bolted-bonnet construction. The valves conform to API 600.

Main features
* Bolted body-bonnet design,seal welded & Valves with pressure seal bonnet
* Bellows-sealed Gate and Globe valves available
* Bolted body-bonnet joints provided with spiral-wound stainless steel gasket and graphite filler for maximum protection against leaks
* Die-formed graphite inner packing rings and braided graphite end rings with Inconel wire reinforcement and corrosion inhibitor
* T-head stem-disc connection of gate valve fully meets strength requirements of API 602 and API 598
* Rolled ACME thread on stem for smooth operation
* Tapered shoulder on the stem for back seating
* Self-aligning type gland assembly with stud-and-nut tightening
* Integral hard-faced body seat for globe and check valves
* Spring-loaded disc on check valves suitable for no horizontal applications too
* Gate and globe valves can be offered with electrical actuators
* Austenitic SS forging for body and bonnet of Cryogenic valves, resulting in excellent impact strength, minimal heat loss and resistance to corrosion
* Valves can be offered to NACE MR-0175 and other special NACE requirements

* The SQK Bellow Seal Gate Valve is exceptionally sturdy, rugged, and durable, with a reputation for quality, integrity, and long service.

* They are designed for tight sealing and ease of operation. The valves are available flanged & butt-weld ends in pressure rating from ASME Class 150 to Class 2500, and in a variety of materials of construction.

* Gate Valves are of flexible wedge design, outside screw and yoke, and bolted-bonnet construction. The valves conform to API 600.

Main features
* Bolted body-bonnet design,seal welded & Valves with pressure seal bonnet
* Bellows-sealed Gate and Globe valves available
* Bolted body-bonnet joints provided with spiral-wound stainless steel gasket and graphite filler for maximum protection against leaks
* Die-formed graphite inner packing rings and braided graphite end rings with Inconel wire reinforcement and corrosion inhibitor
* T-head stem-disc connection of gate valve fully meets strength requirements of API 602 and API 598
* Rolled ACME thread on stem for smooth operation
* Tapered shoulder on the stem for back seating
* Self-aligning type gland assembly with stud-and-nut tightening
* Integral hard-faced body seat for globe and check valves
* Spring-loaded disc on check valves suitable for no horizontal applications too
* Gate and globe valves can be offered with electrical actuators
* Austenitic SS forging for body and bonnet of Cryogenic valves, resulting in excellent impact strength, minimal heat loss and resistance to corrosion
* Valves can be offered to NACE MR-0175 and other special NACE requirements