Description
3″ 8000 PSI Manual Reset Relief Valve Parts & Repair Kits – OTECO Ultra High Pressure Components
Complete replacement parts catalog for the OTECO 3″ 8000 PSI Manual Reset Relief Valve. This ultra high-pressure safety valve delivers exceptional performance in the most demanding oilfield drilling, well servicing, and flowline operations. With a working pressure rating of 8,000 PSI (552 Bar), this valve provides superior overpressure protection for critical high-pressure systems. Our comprehensive parts inventory ensures fast turnaround on maintenance, repairs, and rebuilds to keep your operations running safely and efficiently.
Product Overview
The 3″ 8000 PSI Manual Reset Relief Valve represents the pinnacle of OTECO’s pressure relief technology. When system pressure exceeds the preset relief setting, the valve opens to vent excess pressure. The manual reset feature requires operator intervention to reclose, ensuring that overpressure events are always acknowledged and investigated. This valve is rated for 8,000 PSI (552 Bar) working pressure with 3″ nominal flow path, making it the ideal choice for ultra high-volume, high-pressure flowline and manifold applications where standard relief valves cannot meet the demands.
Exploded View Diagram

Complete Parts List
The following table lists all replacement components for the 3″ 8000 PSI Manual Reset Relief Valve:
Item 1 – Valve Body
| Description |
OTECO Part No. |
Weight Lbs. |
Weight (kg) |
| BODY with 3″ FIGURE 1502 FEMALE OUTLET, STANDARD |
143083 |
160 |
72.6 |
| BODY with 3″ FIGURE 1502 MALE OUTLET, STANDARD |
143081 |
160 |
72.6 |
| BODY with 3.06″-10,000# RJ FLANGED OUTLET, STANDARD |
143086 |
181 |
82.1 |
Item 2 – Inlet Sub
| Description |
OTECO Part No. |
Weight Lbs. |
Weight (kg) |
| SUB with 3″ FIGURE 1002 FEMALE INLET, STANDARD |
143196 |
59 |
26.8 |
| SUB with 3″ FIGURE 1502 FEMALE INLET, STANDARD |
143199 |
59 |
26.8 |
| SUB with 3.06″-10,000# FLANGED INLET, STANDARD |
143198 |
80 |
36.3 |
Item 3 – Piston with Bearing Assembly
| Description |
OTECO Part No. |
Weight Lbs. |
Weight (kg) |
| PISTON with BEARING ASSEMBLY, STANDARD |
143185 |
4 |
1.81 |
Item 4 – Seal Retainer
| Description |
OTECO Part No. |
Weight Lbs. |
Weight (kg) |
| SEAL RETAINER, SOUR GAS/STANDARD |
143035 |
4 |
1.81 |
Item 5 – Lower Seal
| Description |
OTECO Part No. |
Weight Lbs. |
Weight (kg) |
| LOWER SEAL, (UHMWPE) POLYETHYLENE, STANDARD |
302686 |
0.1 |
0.05 |
Item 6 – Middle Seal
| Description |
OTECO Part No. |
Weight Lbs. |
Weight (kg) |
| MIDDLE SEAL, (UHMWPE) POLYETHYLENE, STANDARD |
302689 |
0.1 |
0.05 |
Item 7 – Upper Seal
| Description |
OTECO Part No. |
Weight Lbs. |
Weight (kg) |
| UPPER SEAL, (F1504) FLUOROTREL, STANDARD |
302636 |
0.1 |
0.05 |
Item 8 – Sub Face to Body Seal
| Description |
OTECO Part No. |
Weight Lbs. |
Weight (kg) |
| SUB FACE to BODY SEAL, “O”-RING #247, (NBR) NITRILE 90D, STANDARD |
302428 |
0.1 |
0.05 |
Item 9 – Sub O.D. to Body Seal
| Description |
OTECO Part No. |
Weight Lbs. |
Weight (kg) |
| SUB O.D. TO BODY SEAL, “O”-RING #240, (NBR) NITRILE 90D, STANDARD |
302427 |
0.1 |
0.05 |
Item 10 – Retainer to Body Seal
| Description |
OTECO Part No. |
Weight Lbs. |
Weight (kg) |
| RETAINER to BODY SEAL, “O”-RING #239 (NBR) NITRILE 90D, STANDARD |
302634 |
0.1 |
0.05 |
Item 11 – Body to Top Flange Seal
| Description |
OTECO Part No. |
Weight Lbs. |
Weight (kg) |
| BODY to TOP FLANGE SEAL, “O”-RING #245, (NBR) NITRILE 90D, STANDARD |
302610 |
0.1 |
0.05 |
Item 12 – Retainer to Top Flange Seal
| Description |
OTECO Part No. |
Weight Lbs. |
Weight (kg) |
| RETAINER to TOP FLANGE SEAL, “O”-RING #233, (NBR) NITRILE 90D, STANDARD |
302611 |
0.1 |
0.05 |
Item 13 – Flanged Bolt
| Description |
OTECO Part No. |
Weight Lbs. |
Weight (kg) |
| 7/8″-9UNC FLANGED 12 POINT BOLT, STANDARD |
302613 |
0.5 |
0.23 |
Item 14 – Socket Head Cap Screw
| Description |
OTECO Part No. |
Weight Lbs. |
Weight (kg) |
| 5/8″-11UNC SOCKET HEAD CAP SCREW, CADMIUM, STANDARD |
302470 |
0.5 |
0.23 |
Item 15 – Socket Head Cap Screw
| Description |
OTECO Part No. |
Weight Lbs. |
Weight (kg) |
| 1/2″-13UNC SOCKET HEAD CAP SCREW, CADMIUM, STANDARD |
302495 |
0.5 |
0.23 |
Item 16 – Stud
| Description |
OTECO Part No. |
Weight Lbs. |
Weight (kg) |
| 1″-8UNC STUD, CADMIUM, STANDARD |
302472 |
0.5 |
0.23 |
Item 17 – Hex Nut
| Description |
OTECO Part No. |
Weight Lbs. |
Weight (kg) |
| 1″-8UNC HEX NUT, CADMIUM, STANDARD |
302471 |
0.5 |
0.23 |
Item 18 – FMC Union Seal Ring
| Description |
OTECO Part No. |
Weight Lbs. |
Weight (kg) |
| 3″ FMC UNION SEAL RING 602/1002/1502, (NBR) NITRILE, STANDARD |
301862 |
0.1 |
0.05 |
FMC Detachable Nut Assembly (Item 19-21)
| Item |
Description |
OTECO Part No. |
Weight Lbs. |
Weight (kg) |
| 19 |
3″ FIGURE 1502 UNION NUT, STANDARD/DETACHABLE, STANDARD, DNV |
302625 |
12 |
5.4 |
| 19 |
3″ FIGURE 1502 UNION NUT, STANDARD/DETACHABLE, SOUR GAS, CHARPY |
302540 |
12 |
5.4 |
| 20 |
3″ FIGURE 1502 UNION NUT, RETAINER RING SEGMENTS, STANDARD, DNV |
302628 |
0.5 |
0.23 |
| 20 |
3″ FIGURE 1502 UNION NUT, RETAINER RING SEGMENTS, SOUR GAS |
302541 |
0.5 |
0.23 |
| 21 |
3″ FIGURE 1502 UNION NUT, RETAINER SNAP RING, ALL ASSEMBLIES |
301515 |
0.1 |
0.05 |
FMC Union Weldolet Assembly (Item 22) – Not Included with RRV Assembly
| Description |
OTECO Part No. |
Weight Lbs. |
Weight (kg) |
| 3″ FIGURE 1502 with 3″ BUTT WELD SCH.XXS, STANDARD, DNV |
302036 |
25 |
11.3 |
Repair Kits
Pre-packaged repair kits are available for quick field maintenance and rebuilds:
Repair Kit Part Numbers
| Kit Type |
Service |
OTECO Part No. |
Weight Lbs. |
Weight (kg) |
| MINOR REPAIR KIT |
STANDARD |
143227 |
1 |
0.45 |
| MAJOR REPAIR KIT |
STANDARD |
143221 |
5 |
2.27 |
Minor Repair Kit Contents
| Description |
Assembly # |
| OUTER SEAL |
ITEM 5 |
| MIDDLE SEAL |
ITEM 6 |
| UPPER SEAL |
ITEM 7 |
| (5) “O”-RINGS |
ITEM 8-12 |
| UNION SEAL |
ITEM 18 |
| SPIRAL PINS |
NOT SHOWN |
Major Repair Kit Contents
| Description |
Assembly # |
| PISTON |
ITEM 3 |
| OUTER SEAL |
ITEM 5 |
| MIDDLE SEAL |
ITEM 6 |
| UPPER SEAL |
ITEM 7 |
| (5) “O”-RINGS |
ITEM 8-12 |
| UNION SEAL |
ITEM 18 |
| SPIRAL PINS |
NOT SHOWN |
Major Repair Kit Additional Components
| Description |
Assembly # |
| SPRING SPIRAL |
NOT SHOWN |
| CRANK |
NOT SHOWN |
| CRANK PIVOT |
NOT SHOWN |
| LINK PIN |
NOT SHOWN |
| UPPER LINK |
NOT SHOWN |
| LOWER LINK |
NOT SHOWN |
Key Features of 3″ 8000 PSI RRV Components
- Ultra High Pressure Rating: Designed for 8,000 PSI (552 Bar) working pressure – the highest in the OTECO manual reset relief valve range
- Complete Parts Coverage: All 22 items from body to weldolet assembly, ensuring full rebuild capability
- Heavy-Duty Construction: Body weights up to 181 lbs (82.1 kg) for flanged configurations, built for extreme service
- Multiple End Connections: Figure 1002, Figure 1502, and 10,000# RJ Flanged options for body and sub
- DNV Certified Components: Select union nut assemblies meet DNV certification for offshore applications
- Advanced Seal Technology: UHMWPE polyethylene seals and Fluorotrel upper seal for ultra high-pressure service
- Pre-Packaged Repair Kits: Minor and Major kits available for comprehensive field maintenance
- Fast Turnaround: Extensive inventory ensures minimal downtime for maintenance and repairs
Applications
- Ultra high-pressure drilling rig pressure relief systems
- Deep well servicing and workover operations
- High-pressure flowline and manifold protection
- Mud pump discharge pressure safety
- High-pressure cementing and fracturing operations
- Offshore platform safety systems (DNV certified components)
- Critical pressure control in HPHT wells
Ordering Information
When ordering replacement parts, please specify:
- Item number and description
- OTECO part number
- End connection type (Figure 1002 / Figure 1502 / 10,000# Flanged)
- Quantity required
For complete valve assemblies or technical support, please contact our sales team. Custom configurations and expedited shipping are available upon request.
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