Description
CAMTOP Pressure Relief Клапан (PRV)
Shear Pin Предохранительный клапан | 2″ & 3″ | 500 – 5,000 PSI | NPT Threaded | Буровой насос Protection
Product Overview
CAMTOP Pressure Relief Клапан (PRV) is a critical safety protection device designed for high-pressure mud pump and manifold systems. The valve normally operates in a closed state and automatically opens when system pressure exceeds a preset threshold, safely discharging drilling fluid from the side outlet to prevent pipeline damage and catastrophic failure. The pressure setting is precisely controlled by selecting the correct shear pin diameter, allowing flexible and accurate pressure adjustment in the field.
Constructed with a hardened valve stem and a small piston area design, the CAMTOP PRV ensures reliable, repeatable opening and closing performance. The threaded valve cover enables easy installation and quick field reset, while the standardized NPT connections provide universal compatibility with all major pump brands. Available in 2″ and 3″ sizes, the CAMTOP PRV covers relief pressures from 500 PSI to 5,000 PSI, making it the ideal overpressure protection solution for drilling, well service, and cementing operations.
Product Image
Figure 1. CAMTOP PRV Cross-Section — Internal stem, piston assembly, shear pin mechanism, and NPT threaded connections
Key Features
- Shear Pin Overpressure Protection: Precision shear pins ensure reliable opening at preset pressure thresholds, with seven color-coded grades for accurate pressure calibration.
- Flexible Opening & Closing: Smooth valve operation with minimal hysteresis ensures reliable pressure relief and rapid reseating after discharge.
- Small Поршень Area: Reduced piston cross-section minimizes the total force required for shear pin activation, improving pressure accuracy and repeatability.
- Simple Field Reset: Threaded valve cover allows quick access to internals for pin replacement and valve reset without removing the valve from the pipeline.
- Universal Compatibility: Standard NPT threaded connections enable direct installation on all major mud pump brands and manifold systems.
- Hardened Клапан Шток: Induction-hardened stem surface extends product life and resists abrasive wear from drilling fluid and proppant.
- Threaded Клапан Крышка: Screwed bonnet design provides easy installation, maintenance access, and rapid field reset after shear pin activation.
- Low Cost Operation: Simple mechanical design with minimal wear parts reduces maintenance cost and downtime compared to spring-loaded alternatives.
- Dual Shear Pin Capability: Double-shear bonnet configuration allows parallel installation of two pins for higher pressure settings up to 5,000 PSI.
- NBR Sealing Components: High-quality nitrile rubber (NBR) stem cushion and piston seal provide reliable sealing in standard drilling fluid service.
Technical Specifications
Pressure Relief Клапан General Specifications
| Parameter | Specification |
|---|---|
| Product Name | CAMTOP Pressure Relief Клапан (PRV) — Shear Pin Type |
| Nominal Size | 2″, 3″ |
| Pressure Range | 500 PSI – 5,000 PSI (34.5 – 344.7 Bar) |
| Relief Mechanism | Shear pin activation — single or double pin configuration |
| Inlet Connection | 2″ NPT Male (Втулка Переводник) / 3″ NPT Male (Втулка Переводник) |
| Outlet Connection | 2″ NPT Female / 3″ NPT Female |
| Корпус Material | High-strength alloy steel (forged) |
| Шток Material | Induction-hardened alloy steel |
| Уплотнение Material | NBR (Nitrile Butadiene Резиновый) — standard |
| Shear Pin Material | Precision alloy steel, color-coded by grade |
| Operating Temperature | –29°C to +82°C (standard NBR seals) |
| Service Media | Drilling mud, water-based fluids, oil-based fluids, cement slurry |
| Design Standard | API 7K / API 16C (mud pump and choke & kill line applications) |
Shear Pin Pressure Settings (PSI / Bar)
| PRV Model | Pins | #16 Blue | #20 Red | #30 Grey | #40 Green | #45 Silver | #50 Black | #60 Orange |
|---|---|---|---|---|---|---|---|---|
| 2″PRV-20513 | 1 | 500 (34.5) | 625 (43.1) | 750 (51.7) | 875 (60.3) | 1,000 (68.9) | 1,125 (77.6) | 1,250 (86.2) |
| 2″PRV-21027 | 1 | 1,000 (68.9) | 1,250 (86.2) | 1,500 (103.4) | 1,750 (120.7) | 2,000 (137.9) | 2,250 (155.1) | 2,500 (172.4) |
| 2″PRV-21050 | 1 | 1,000 (68.9) | 1,250 (86.2) | 1,500 (103.4) | 1,750 (120.7) | 2,000 (137.9) | 2,250 (155.1) | 2,500 (172.4) |
| 2″PRV-21050 | 2 | 2,000 (137.9) | 2,500 (172.4) | 3,000 (206.8) | 3,500 (241.3) | 4,000 (275.8) | 4,500 (310.3) | 5,000 (344.7) |
| 3″PRV-30525 | 1 | 500 (34.5) | 625 (43.1) | 750 (51.7) | 875 (60.3) | 1,000 (68.9) | 1,125 (77.6) | 1,250 (86.2) |
| 3″PRV-30525 | 2 | 1,000 (68.9) | 1,250 (86.2) | 1,500 (103.4) | 1,750 (120.7) | 2,000 (137.9) | 2,250 (155.1) | 2,500 (172.4) |
| 3″PRV-30550 | 1 | 1,000 (68.9) | 1,250 (86.2) | 1,500 (103.4) | 1,750 (120.7) | 2,000 (137.9) | 2,250 (155.1) | 2,500 (172.4) |
| 3″PRV-30550 | 2 | 2,000 (137.9) | 2,500 (172.4) | 3,000 (206.8) | 3,500 (241.3) | 4,000 (275.8) | 4,500 (310.3) | 5,000 (344.7) |
Main Components
2″ Pressure Relief Клапан — Model PRV-21050
| Item | Component | Description | Part Number |
|---|---|---|---|
| 1 | Клапан Корпус | 2″ NPT female outlet, forged alloy steel, pressure-containing main structure | 140125 |
| 2 | Safety Крышка | Protective cover for shear pin area, prevents debris ingress and operator injury | 141125 |
| 3 | Double Shear Bonnet | BO2150 for Model 21050, accepts one or two shear pins for flexible pressure setting | 140215 |
| 4 | Шток Cushion | NBR nitrile rubber cushion, provides stem sealing and vibration damping | 140325 |
| 5 | Клапан Шток | Model 21050, induction-hardened alloy steel, includes stem pin (Item 9) | 141225 |
| 6 | Поршень Комплект | NBR nitrile standard, includes washer (Item 7) and cotter pin (Item 8) | 141025 |
| 7 | Washer | 1/2″ cadmium plated steel washer, retains piston assembly | 301590 |
| 8 | Cotter Pin | 3/16″ × 1″, secures piston to stem assembly | 301591 |
| 9 | Шток Pin | Connects stem to piston assembly, transmits upward thrust to shear pin | 140015 |
| 10 | Shear Pins | #16 through #60, color-coded by grade, determines relief pressure setting | — |
| 15 | Втулка Переводник | 2″ NPT male inlet, standard alloy steel, connects to pump discharge line | 140425 |
| 16 | Кольцо уплотнительное | NBR nitrile, provides static seal between body and bonnet | 140725 |
3″ Pressure Relief Клапан — Model PRV-30550
| Item | Component | Description | Part Number |
|---|---|---|---|
| 1 | Клапан Корпус | 3″ NPT female outlet, forged alloy steel, pressure-containing main structure | 140135 |
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