Plug Valve
공칭 직경：1/2″~40″(DN15-DN1000）
공칭 압력：Class150-Class2500
최대 작동 온도：-45~540°
쉘 소재：
A105、LF2、F304、F316、F304L、F316L、F51、WCB、LCB、WCC、CF8、CF8M、CF3、CF3M、A890 4A , etc
설계 기준：API 599, API 6D, ASME B16.34, API 598, ASME B16.10
연결플랜지 또는 용접
드라이브 모드：Manual, Electric, Pneumatic, Hydraulic, Lever, Gearbox
적용 분야:Oil & Gas, Petrochemical, Refining, LNG, LOX, LIN, LPG, Power, Water, Pulp & Paper, etc.
Plug Valve
제품 정의 및 안전 임무:
Plug Valve is core equipment for oil, chemical, and harsh-condition pipelines, enabling rapid opening/closing, reliable shut-off, and multi-directional flow diversion. It overcomes sealing failure, high torque, and flow channel blockage from viscous or particle-laden media. JH plug valves use a conical or cylindrical plug precision-fitted to the valve body cavity, achieving full open/close or flow reversal with 90° rotation. This valve strictly complies with API 599, API 6D, and its full-bore, zero-fouling design makes it the preferred choice for oil loading, slurry transport, and process switching.
JH Plug Valve Technology Core:
- Full-bore zero stagnation: Straight flow path matching pipe ID, flow resistance coefficient Kv ≈ 1.
- Low torque operation: Special lubrication/lining between plug and body, operating torque ≤ 80% of same-size ball valve.
- Multi-port design: Available in 2-way, 3-way (L/T-type), and 4-way configurations for single-valve process switching.
- Standards compliance: Design and manufacturing meet API 599, ASME B16.34, fire-safe (API 607), and sour service (NACE MR0175) standards.
- 제품 기술 분석
- Lubricated Type
- Non-Lubricated/Lined Type
The core technology of Plug Valve lies in the precise taper fit between the plug and the valve body cavity, and the dynamic sealing mechanism. The lubricated type achieves sealing and significantly reduces sliding friction torque by establishing a renewable grease film between the metal sealing surfaces; the plug often features a pressure balancing channel to equalize pressure. The non-lubricated type utilizes the resilience of an elastic liner or mechanical wedging to achieve sealing. For wear or corrosion conditions, the plug can be coated with tungsten carbide (hardness ≥70 HRC) or lined with perfluoropolymer. All valves undergo rigorous torque testing and API 598 sealing testing to ensure the core performance of “easy rotation and tight sealing.”
This sub-type plug valve injects special sealing grease between the plug body and the valve body to achieve dynamic sealing and lubrication. It is suitable for oil, natural gas and viscous media, and for applications requiring a tight seal.
핵심 프로세스:
▌ Grease System → The valve body is equipped with a grease injection valve, which can inject grease conforming to ISO 6743-9 to form and maintain a sealing film, achieve Class VI sealing, and compensate for minor wear on the sealing surface.
▌ Fire Safety Design → The lubricant is flame retardant and provides auxiliary metal-to-metal contact surfaces | It passes API 607 testing and can maintain basic shutdown function after a fire.
▌ Anti-lock structure → The plug body is equipped with an anti-lifting mechanism to prevent the medium pressure from lifting and jamming it | Ensuring easy operation and reliable opening and closing even under high pressure differential.
▌ Heavy-duty application certification → Widely applicable to refinery oil pipelines, natural gas metering skids, etc., and meets API 6D pipeline valve requirements.
This plug valve features a seal between the plug and valve body without lubricant, relying on an elastic material lining (such as PTFE or PFA) or surface hardening treatment, making maintenance simple. It is suitable for corrosive, slurry, and clean media applications.
핵심 프로세스:
▌ Fully Lined for Corrosion Protection → The entire valve body cavity is lined with PTFE or PFA with a thickness ≥ 3mm (ASTM D4894) | This achieves complete isolation between the metal and the medium, suitable for corrosive media such as strong acids and strong alkalis.
▌ Scaling-resistant smooth flow channel → Smooth lining surface with low coefficient of friction (PTFE ≈ 0.04) | Slurry or viscous media do not easily adhere, eliminating the problem of scaling and clogging inside valves.
▌ Maintenance-free design → No lubrication system, no need for regular grease injection | Reduces maintenance costs and frequency, suitable for locations that are difficult to access or require a clean environment.
▌ Sanitary grade option → Available with a polished surface to Ra ≤ 0.8μm and quick-connect clamp interface | Meets hygiene standards for the food and pharmaceutical industries.
핵심 설계 및 장점
- Zero flow stagnation throughout the entire diameter: Provides a straight flow path with the same diameter as the pipe, eliminating dead zones and chambers → extremely low flow resistance, completely eliminating clogging problems caused by easily coagulating media such as slurries.
- Rapid multi-directional control: 90° rotation enables switching or flow direction change → fast process switching, simplified piping, and savings in space and cost.
- Demanding sealing performance: Lubricated type achieves Class VI bubble seal; Lined type resists strong corrosion → Provides absolutely reliable shut-off for hazardous or sensitive media.
- Low maintenance and long life: Lubricated type supports online grease injection maintenance; non-lubricated type uses long-life lining → long maintenance cycle and low total cost of ownership (TCO).
- Wide range of material compatibility: Comprehensive selection of valve body and lining materials → Overcoming various extreme working conditions from strong corrosion to severe wear.
- Fire protection and safety design: Meets API 607 fire protection standards and has an anti-static structure (resistance <10⁶ Ω) | Meets mandatory safety requirements for hazardous areas.
- Global standard certification: Compliant with API 599, ASME, PED and other standards → Ensures access and compliance in major global markets.
기타 제품
FAQ-Plug Valve
A Plug Valve is a valve that uses a tapered or cylindrical plug with a through-port that rotates to open or close the flow path. Its working principle: when the port aligns with the pipeline axis, the valve is fully open; when the plug rotates 90°, the port is perpendicular to the pipeline axis, closing the valve. Plug valves feature simple construction, rapid operation, and low flow resistance, making them particularly suitable for applications requiring quick shut-off.
Plug valves are mainly classified into the following types:
| 유형 | Structural Features | Core Advantages | 응용 프로그램 |
|---|---|---|---|
| Lubricated Plug Valve | Sealing lubricant injected between body and plug | Reliable sealing, smooth operation | High pressure, high temperature, media with particles |
| Non-Lubricated Plug Valve | PTFE or other self-lubricating liner | Maintenance-free, corrosion resistant | Corrosive media, clean media |
| Eccentric Plug Valve | Eccentric design between plug and seat | Frictionless operation, long seal life | Demanding services, frequent operation |
| 3-Way/4-Way Plug Valve | Multi-port design | Flow switching,Diversion, merging | Multi-path fluid control |
Our Plug Valves are designed and manufactured in strict compliance with international standards and classification society rules, holding major certifications including API, ISO, CE, ABS, BV 및 CCS. Additionally, the products comply with:
API 6D Pipeline valve standards
API 599 Plug valve design standards
API 607 / ISO 10497 Fire test standards
ISO 15848 Fugitive emissions certification
NACE MR0175 / ISO 15156 Sour service material requirements
These certifications ensure compliance and reliability for applications in oil, gas, chemical, and marine industries.
Both plug valves and ball valves are quarter-turn valves, but they have distinct characteristics:
| 측면 | Plug Valve | 볼 밸브 |
|---|---|---|
| Construction | Tapered or cylindrical plug | Spherical ball |
| Sealing Surface | Tapered fit or liner sealing | Ball-to-seat line contact |
| Flow Path | Full bore, very low flow resistance | Full bore or reduced bore |
| Media Suitability | Viscous media, media with particles | Clean media, gases |
| 유지 | Some types allow inline maintenance | More complex maintenance |
| 비용 | 낮음~중간 | Medium to high |
Selection Guide:
Plug Valve: Suitable for viscous media, media with solids, and frequent operation
Ball Valve: Suitable for clean media, gases, and applications requiring tight shut-off
설치 및 유지보수 지점:
설치 방향: Plug valves are typically bidirectional sealing, but installation per body marking is recommended
Operating Position: Ensure sufficient space for the operating mechanism (handle, gear operator)
Fully Open/Closed: Plug valves should be fully open or fully closed, avoiding prolonged partially open positions
윤활 유지 보수: For lubricated plug valves, inject sealing lubricant through the grease fitting regularly
Regular Operation: 추천합니다 operate monthly to prevent plug sticking
봉인 확인: Periodically verify sealing integrity in the closed position
청소 및 유지 관리: For media with particles, regularly clean the valve cavity to prevent particle accumulation
일반적인 실패 사례 및 대책:
| Failure | Possible Causes | Prevention | Solution |
|---|---|---|---|
| Seal Leakage | Worn sealing surfaces, insufficient lubricant, foreign object obstruction | Regular lubrication, install strainer | Re-lubricate, lap sealing surfaces, replace plug/liner |
| Operation Sticking | Insufficient lubrication, media crystallization, plug deformation | Regular lubrication, regular operation | Add lubricant, clean cavity, replace plug |
| External Leakage | Worn packing, stem corrosion | Regular packing inspection | Tighten or replace packing, replace stem |
| Lubrication Failure | Grease fitting clogged, lubricant deteriorated | Regular lubrication system check | Clean grease fitting, replace lubricant |
Marine plug valves must meet the specific requirements of the marine environment:
Seawater Corrosion Resistance: Body materials选用Bronze, Nickel-Aluminum Bronze, Duplex seawater-resistant materials
비스파크형: Copper alloys do not create sparks upon impact, suitable for fuel oil and lubricating oil systems
Fire Safety: Comply with 솔라스 requirements and API 607 fire test standards
Vibration Resistance: Designed to withstand continuous vibration during vessel operation
Classification Society Approval: Must be type-approved by ABS, BV, CCS, LR, NK classification societies
Fuel System Application: Fuel tank outlets require compliant plug valves
정확한 선택을 위해 다음 정보를 제공해 주십시오.
크기 및 압력 등급: 예: DN50, PN40 또는 2인치, 클래스 300
밸브 유형: Lubricated, non-lubricated, eccentric, multi-port
연결 유형: Flanged (standard & face type), threaded, butt weld
작동 방법: Handle, worm gear, pneumatic, electric, hydraulic
재료 소요량: Body, plug, liner, stem materials
언론 보도 자료: Media name, temperature, pressure, corrosiveness, presence of particles, viscosity
선급협회 요구사항: ABS, BV, CCS, LR, NK 승인
특별 요구 사항: Fire-safe certification, fugitive emission requirements, lubrication system, special coating, certification needs