Description
DEMCO DM Серия 4 in. Полнопроходной Задвижка – 7500 PSI WP
The DEMCO DM Серия 4 in. (100 mm) Полнопроходной Задвижка is the largest bore size in the DM Серия lineup, engineered for high-flow oilfield applications requiring maximum throughput with minimal pressure drop. With a full 4.00″ (102 mm) valve seat ID and a robust 7500 PSI working pressure rating, this gate valve is ideal for high-volume flowline systems, large-bore manifold installations, and heavy-duty production operations.
Manufactured in full compliance with API 6A, 17th Edition, the 4-inch full port gate valve offers dual end connection options — Weld End and Фланцевый End with API Кольцо BX-155 — providing flexibility for different piping configurations. The full port design ensures unrestricted flow, reducing turbulence and erosion while maximizing system efficiency.
Шпонка Features & Benefits
- Полнопроходной Design: 4.00″ (102 mm) valve seat ID provides maximum flow capacity with minimal pressure loss
- High Рабочее давление: Rated for 7500 PSI WP, suitable for demanding upstream and production applications
- Dual End Connections: Available in Weld End and Фланцевый End (API Кольцо BX-155) configurations
- API 6A Compliant: Meets API 6A, 17th Edition standards for wellhead and Christmas tree equipment
- Multiple Материал Options: Configurable with 410 SS or 17-4 PH SS stem and gate materials
- Гибкий Sealing: Viton or HNBR seal elastomer options for different service conditions
- Three Испытание Groups: Group 1, Group 2, and Group 3 hydrostatic test requirements available
Dimensional Data & Weights
| Dimension | 4 in. (100 mm) FP – 7500 WP |
|---|---|
| A – Weld End | 16.00″ (406 mm) |
| A – Фланцевый End | 26.38″ (670 mm) |
| Клапан Седло ID | 4.00″ (102 mm) |
| Overall Высота | 27.54″ (700 mm) |
| Overall Ширина | 20.00″ (508 mm) DIA |
| Bonnet Высота | 4.40″ (112 mm) |
| Number of Ручка Turns (Открытый to Закрытый) | 21.36 |
| Вес – Weld End | 310 lb (141 kg) |
| Вес – Фланцевый End | 475 lb (215 kg) |
Фланцевый End Specifications
| Specification | Value |
|---|---|
| API Кольцо Number | BX-155 |
| Фланец ID | 4.06″ (103 mm) |
| Фланец OD | 12.44″ (316 mm) |
| Фланец Bolts (Qty – Размер) | 8 – 1 1/8″ |
Гидростатический Test Requirements
| Test Group | Shell Test | Седло Test | Additional Requirements |
|---|---|---|---|
| Group 1 | 11,250 PSI for 3 minutes | 7,500 PSI for 3 minutes, each side | Материал traceability on body and bonnet |
| Group 2 | 11,250 PSI for 3 min, drop to 0, 11,250 PSI for 15 min (charted) | 7,500 PSI for 3 min, drop to 0, 7,500 PSI for 15 min (charted) | Удар tests at or below -50°F (-46°C) on body, bonnet, stem, housing, packing retainer, and bolting. Surface NDE on body, bonnet, and stem. |
| Group 3 | Same as Group 2 | Same as Group 2 | Same as Group 2 plus volumetric NDE on body and bonnet |
В сборе Part Number Configuration
| Code Position | Description | Options |
|---|---|---|
| 1st Digit | End Соединение | 5 – Weld End | 7 – Фланцевый End |
| 2nd Digit | Корпус Configuration | 5 – Weld | 7 – Фланцевый |
| 3rd Digit | Шток Материал | 7 – 410 SS | 8 – 17-4 PH SS |
| 4th Digit | Gate/Износ Кольцо Материал | 2 – Стальной/Стальной | 7 – 17-4 PH SS/410 SS |
| 5th Digit | Седло Кольцо Материал | 1 – 410 SS |
| 6th Digit | Седло/Уплотнение Elastomer | 2 – Viton/Viton | 4 – HNBR/HNBR |
Example: J0XXXXX = В сборе Base Number for 4 in. Полнопроходной Weld End Задвижка
Уплотнение & Elastomer Options
- Viton (FKM): Стандарт high-performance fluoroelastomer suitable for most hydrocarbon service. Температура range: -20°F to 400°F (-29°C to 204°C).
- HNBR (Hydrogenated Nitrile): Enhanced abrasion and chemical resistance for sour gas and abrasive media applications. Температура range: -40°F to 300°F (-40°C to 149°C).
Typical Applications
- High-volume flowline and manifold systems
- Large-bore production wellheads and Christmas trees
- Высокого давления water injection and gas lift systems
- Fracturing and stimulation flowback operations
- Морской platform piping and process systems
- Refinery and petrochemical process lines
Why Choose DEMCO DM Серия Gate Клапаны?
DEMCO gate valves are trusted by operators worldwide for their proven reliability, consistent performance, and API-certified quality. The DM Серия features a time-tested expanding gate design that provides positive mechanical seal engagement, bi-directional flow capability, and long service life even in the harshest oilfield environments. With comprehensive material and seal options, plus three testing group levels, DEMCO gate valves can be configured to meet virtually any operational requirement.
