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H-4 Pilot Operated Reducing Valve for Drilling Rig Winch Control

Name: H-4 Pilot Operated Reducing Valve for Drilling Rig Winch Control
Brand: Weihai Zhonghao Pneumatic & Hydraulic Co., Ltd.
SKU: 2142651342

Shandong, ChinaWeihai Zhonghao Pneumatic & Hydraulic Co., Ltd.

US$135.00

1-10 Pieces

US$133.00

11-50 Pieces

US$130.00

51-100 Pieces

US$115.00

101+ Pieces

Product profile

Customization

Available

Media

Oil

Standard

ISO9001

Model NO.

H-4

Certification

CCC, RoHS, ISO, CE

Temperature

Ordinary Temperature

Connection

Thread

Valve Seat

Single-Seat

Structure

Piston

Material

Alloy

Warranty

6 Month

Nominal Diameter (mm)

Maximum Service Pressure(MPa)

1.6MPa

Working Temperature(Oc)

-40---60

Leakage(Nml/Min)

150nml/Min

OEM

OEM Services Provided

Application

Petroleum, Energy and Minerals

Transport Package

Carton

Specification

15*13*28

Origin

China

Production Capacity

30000/Years

Key features

Versatile Cam Operation: Reversible, rotating, and rearrangeable cams allow multiple 3-way, 2-unit, and multi-position configurations.

Piston Structure Design: Single-seat piston structure ensures reliable sealing and precise flow control for drilling rig winches.

Comprehensive Certifications: Certified with CCC, RoHS, ISO, and CE standards ensuring safety and quality compliance.

OEM and ODM Services: Full customization available from samples or designs with dedicated R&D engineering support.

Low Leakage Performance: Engineered for minimal leakage with a rating of 150 nml/Min for high efficiency.

Flexible Positioning: Available with detents for 2, 3, or 5 positions or spring return to center for 3-position operation.

Alloy Material Construction: Durable alloy material provides strength and resistance for petroleum and energy applications.

Company profile

High Repeat Buyers ChoicePatents AwardedNational Award receivedManagement Certification

Weihai Zhonghao Pneumatic & Hydraulic Co., Ltd.

Shandong, China

CertifiedBusiness Type: Manufacturer/Factory & Trading Company CertifiedR&D Capacity: ODM Service Available & OEM Service Available CertifiedCustomization Options: Customization from Samples, Customization from Designs, etc. CertifiedExport Year: 5 years CertifiedNearest Port: Qingdao PortAverage Response Time: ≤2.88h

AI-Powered supplier vetting

SummaryWeihai Zhonghao Pneumatic Complete Equipment Co., Ltd. is presented as an integrated pneumatic and hydraulic equipment supplier covering R&D, production, sales and after-sales service. It identifies itself as a professional technical supplier offering 3D software design and sample-, design-, and fully customized services. The company reports more than 15 years of industry experience and operation since 2007, along with ISO9001, CE and SGS-related certifications or reports. Evidence supports responsive technical and after-sales assistance, inventory capability, valid manufacturing contracts with associated subcontractors, and structured supplier-service procedures. However, it reported no new products during the past year, has no overseas warehouse or showroom, and provides no direct evidence of customer cases or financial credibility. Finished-product inspection instructions exist, but written inspection records are not maintained.

Supplier typeThe supplier is explicitly described as a professional technical supplier and as an integrated enterprise covering R&D, production, sales and after-sales service for pneumatic and hydraulic components. Its stated business scope also includes electronic, electromechanical, plastic, rubber and related equipment products.

CertificationsThe company states that it holds ISO9001 and CE certifications and has SGS reports to enhance product credibility. This is explicit evidence of certification-related holdings, although the slices do not provide certificate validity dates or detailed scopes.

After-Sales capabilityThe supplier describes pre-sales, in-sales and after-sales support through on-site service, video guidance and phone assistance, supported by senior technical engineers handling installation, commissioning and fault diagnosis. It also reports inventory capability, but lacks overseas warehouse and showroom capability.

Production capacityThe supplier presents itself as a manufacturer with production capabilities, valid contracts with each related subcontractor, inventory capability, and documented service-capability procedures with records. Finished-product inspection instructions exist but lack written records, which limits evidence of production-quality control execution.

Customization capabilityThe supplier explicitly offers customization from samples, customization from designs and full customization, and provides 3D software design services. Its technical team is also described as experienced in product design and production technology, supporting tailored solutions.

Product Q&A

Q:How is the quality of the product?

Our products have ISO quality certification.

Q:How long is the product delivery time limit?

3-7days

Q:Are you a factory?

Yes, we are a factory. We have a complete production line, a quality inspection process, and a complete production and research and development team.

Q:Is customization supported for this product?

can customize

Q:Can we visit your factory?

Sure, we warmly welcome and host many foreign customers to our factory for verification. We will provide accommodation and activities such as tours in the local area.