**Pressure Control Valve 8P7790 for D7G Spare Parts**
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Model NO.: 8P7790
Trademark: GR
Specification: Standard
Origin: Beijing, China
HS Code: 848340900
**About Shenzhen Gemray International Trade Co., Ltd.**
Shenzhen Gemray International Trade Co., Ltd. is a professional supplier of construction machinery parts, specializing in the sales and production of high-quality spare parts. We focus on providing reliable and durable components for various models including bulldozers (D20, D21, D31, D41, D50A-16-17, D60A-6-7-8, D65A-6-7-8-12, D80A-12-18, D85A-18-21, D155A-1-2-3, D355A-3/5, D65E-12, D85ESS-2, D6D & D7G), excavators (PC200-1-2-3-5-6-7, PC300-1-3-5-6-7, PC400-1-3-5-6, PC650-1-3-5, E200B, 320, 320B, C), and engine parts. Our product range includes idlers, thrust wheels, sprocket wheels, driving wheels, cylinders, cylinder service knits, universal couplings, torque converters, ring seals, clutches, hydraulic pumps, slewing bearings, and more. Engine parts such as crankshafts, camshafts, connecting rods, piston rings, fuel injectors, and valves are also available.
With years of experience in international trade, we ensure that our products meet world-class quality standards through strict quality control and customer-focused service. Our commitment to "Quality First, Customers Foremost" has helped us build a strong global presence, with exports reaching over 20 countries, including the United States, Russia, South America, the Middle East, and Southeast Asia. We are dedicated to offering competitive pricing, fast delivery, and excellent after-sales support.
**Why Choose Us?**
1. Professional and efficient pre-sale, sales, and after-sales service.
2. High-quality products sourced from top Chinese manufacturers, with rigorous quality checks before shipment.
3. Competitive pricing and timely delivery.
4. One-stop solution for all your spare parts needs, saving you time and effort.
5. One-year warranty on all products.
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We look forward to building long-term partnerships with you and delivering exceptional value and service. Let’s grow together and achieve mutual success!Special Iron Sulfide For Resin Grinding Wheels
Application of Ferro Sulfur for the manufacturing of cast iron:
Low sulfur content in gray cast iron molten iron is harmful: poor inoculation effect, poor graphite morphology, and poor cutting performance
When melted in a foundry, the residual sulfur content decreases, mainly due to the use of scrap steel and low sulfur.
The content contained has been determined, and if the sulfur content is below 0.04%, melting will not easily react with the inoculant.
Therefore, it is necessary to use sulfur addition agent to increase the sulfur content, in order to maintain the sulfur content within the range of 0.05% to 0.12%.
Within this range, sulfur shortens the length of graphite, blunts its ends, bends its morphology, and improves its mechanical properties. When the sulfur content is below 0.05%, sulfur addition treatment must be carried out.
According to metallographic analysis, sulfur in molten iron exists in a special form, so it is necessary to use a specialized sulfur addition agent when adding sulfur. Do not use sulfur or other sulfur containing minerals as this can greatly damage the internal structure of the casting!
For ductile iron, a low sulfur content (below 0.008%) in the raw molten iron is also unfavorable. The normal range of 0.010% -0.014% is better. However, for electric furnace melting, it is necessary to use sulfur oxygen inoculants within this range to slightly increase sulfur and improve the activity of molten iron
The use method of sulfur addition agent: During the production process of the electric furnace, a small amount of iron is added to the furnace, and then sulfur addition agent with the particle size of 8-25mm is added to the furnace according to the sulfur demand. Then add iron to press the sulfur addition agent for melting, with an absorption rate exceeding 99%
Specification of sulfur addition agent: -150 mesh -325 mesh 10-30 mesh 10-50 mesh 5-15mm 200 mesh 325 mesh 400 mesh 95% pass
Golden Resin Grinding Wheel,Used in the Grinding Industry,Abrasive Iron Sulfide
LUANCHUAN COUNTY HENGKAI METALLURGICAL MATERIALS SALES CO.,LTD , https://www.pyritechina.com