Engineered Flow Control for the Oil & Gas Industry
Valves are among the most critical components in any oil and gas facility. They control, isolate, regulate, and protect the flow of hydrocarbons, process fluids, and utilities across the entire asset lifecycle—from wellhead to refinery. A single under-spec valve can cause unplanned shutdowns, safety incidents, and environmental releases.
Hoger Sanat Pars supplies a comprehensive range of manual and actuated valves manufactured to international standards including API, ASME, ISO, and NACE. Every valve we source comes with full material traceability, pressure test certification, and compliance documentation.
Our Valve Categories at a Glance
| Category | Primary Function | Key Standards |
|---|---|---|
| Gate Valves | On/off isolation with minimal pressure drop | API 600, API 602, API 603, API 6A, ASME B16.34 |
| Globe Valves | Throttling and flow regulation | API 602, API 623, ASME B16.34 |
| Ball Valves | Quarter-turn on/off isolation, tight shutoff | API 6D, API 608, API 6A, ISO 17292 |
| Check Valves | Prevent reverse flow, protect equipment | API 594, API 6D, ASME B16.34 |
| Butterfly Valves | Large-diameter isolation and throttling | API 609, ASME B16.34 |
| Plug Valves | Quarter-turn isolation for slurries and viscous fluids | API 599, API 6D |
| Choke Valves | High-pressure flow control for wellheads | API 6A |
| Control Valves | Automated process control (pressure, flow, level, temperature) | ISA-75, IEC 60534, API 6D |
| Safety & Relief Valves | Overpressure protection | API 526, ASME Section VIII, API 520/521 |
| Wellhead & Christmas Tree Valves | Surface flow control for drilling and production | API 6A |
1. Gate Valves
The most widely used isolation valve in the oil and gas industry. A linear-motion valve with a wedge or slab gate that provides unobstructed flow when fully open.
Primary Applications:
- Pipeline isolation (mainline block valves)
- Refinery and process plant isolation
- Tank farm inlet/outlet block valves
- Wellhead isolation (API 6A gate valves)
Gate Valves
Types:
- Flexible Wedge Gate: Self-adjusting, good for varying temperatures, most common in refineries
- Solid Wedge Gate: Robust, simple design, suitable for moderate temperatures
- Parallel Slide Gate: Low friction, good for high-pressure steam
- Through-Conduit Slab Gate: Full-bore design for pipelines that require pigging
- Expanding Gate: Positive mechanical seal on both seats, ideal for critical isolation
- Pressure-Seal Gate: Bonnet seals tighter with increasing pressure, for high-pressure steam
Typical Standards: API 600 (heavy-wall), API 602 (compact, small-bore), API 603 (stainless), API 6A (wellhead), ASME B16.34
Sizes: 1/2″ to 60″+
Pressure Classes: 150# to 4500#
2. Globe Valves
A linear-motion valve with a plug and seat arrangement designed for flow regulation and throttling. Characterized by an S-shaped or angle body flow path.
Primary Applications:
- Flow regulation in process piping
- Boiler feedwater control
- Steam and condensate systems
- Bypass lines around block valves
- Instrument isolation and throttling
Globe Valves
Body Patterns:
- T-Pattern (Straight Pattern): Most common, used where pressure drop is acceptable
- Y-Pattern: Angled seat and stem reduce turbulence and pressure drop
- Angle Pattern: Inlet and outlet perpendicular, combines valve and elbow function
Disc Types:
- Flat Disc: General service
- Needle Disc: Fine flow regulation
- Parabolic/Contoured Disc: Extended throttling range
Typical Standards: API 602, API 623, BS 1873, ASME B16.34
Sizes: 1/2″ to 24″
Pressure Classes: 150# to 2500#
3. Ball Valves
A quarter-turn rotary valve using a spherical ball with a bore through its center. The industry standard for tight shutoff and rapid operation.
Primary Applications:
- Emergency shutdown (ESD) valves
- Pipeline block valve stations
- Compressor station isolation
- Meter station isolation
- Offshore topsides and subsea isolation
- Sour gas service (with NACE-compliant materials)
Ball Valves
Ball Configurations:
- Floating Ball: Ball is not fixed, held against downstream seat by line pressure. For smaller sizes (≤6″ to 8″)
- Trunnion-Mounted Ball: Ball supported by bearings at top and bottom. For larger sizes and higher pressures
- Top Entry: Internals accessible from top, maintenance without removing from line
- Fully Welded: Leak-tight body for buried service (gas distribution)
- V-Port / Segmented Ball: For control and throttling applications
Seat Types:
- Soft Seated: PTFE, reinforced PTFE, PEEK, Nylon. Tight shutoff. Limited to moderate temperatures (~200°C)
- Metal Seated: Stellite, tungsten carbide, or coated seats. For high temperatures, slurries, abrasive fluids
Typical Standards: API 6D (pipeline), API 608 (process), API 6A (wellhead), ISO 17292, API 607/6FA (fire-safe)
Sizes: 1/4″ to 60″+
Pressure Classes: 150# to 4500#
4. Check Valves
An automatic, one-directional valve that prevents reverse flow. Essential for protecting rotating equipment, preventing tank backflow, and maintaining system integrity.
Primary Applications:
- Pump and compressor discharge protection
- Preventing backflow from pressurized systems
- Tank inlet protection (prevents siphoning)
- Gas and liquid pipeline flow assurance
Check Valves
Types:
- Swing Check: Simple hinged disc, low pressure drop, suitable for horizontal lines. Not for pulsating flow
- Dual Plate / Double Door: Two spring-loaded half-discs. Lightweight, compact face-to-face, excellent for high-pressure gas
- Piston / Lift Check: Guided piston, suitable for vertical lines and pulsating flow (compressor discharge)
- Ball Check: Simple ball and seat, used for viscous fluids and slurry
- Nozzle / Axial Flow Check: Venturi-shaped body, guided disc, ultra-fast closing. Best for compressor stations and critical applications
- Tilting Disc Check: Disc pivots slightly off-center, self-aligning, good for large-diameter water and low-pressure gas
- Wafer Check: Extremely short face-to-face, fits between flanges. Most economical
Typical Standards: API 594 (wafer), API 6D (pipeline), ASME B16.34, API 598 (testing)
Sizes: 1/2″ to 60″+
Pressure Classes: 150# to 4500#
5. Butterfly Valves
A quarter-turn rotary valve with a disc mounted on a rotating shaft. Valued for compact face-to-face dimensions, light weight, and cost-effectiveness in large diameters.
Primary Applications:
- Cooling water lines (large diameter)
- Firewater main isolation
- Air intake and exhaust systems
- Low-pressure steam and condensate
- Tank venting and overflow lines
Butterfly Valves
Types:
- Concentric (Resilient Seated): Simple rubber-lined body, zero-leakage shutoff. Ideal for water and non-critical service
- Double Offset (High Performance): Offset shaft reduces seat friction. Higher pressure/temperature than concentric. Fire-safe available
- Triple Offset (Metal Seated): Torque-seated metal-to-metal seal. Zero leakage. For high-temperature, cryogenic, and critical isolation applications
Typical Standards: API 609 (Category A = concentric, Category B = offset), ASME B16.34
Sizes: 2″ to 72″+
Pressure Classes: 150# to 900#
6. Plug Valves
A quarter-turn valve with a cylindrical or tapered plug. Excellent for slurries, viscous fluids, and applications requiring frequent operation.
Primary Applications:
- Produced water and drilling mud
- Oil sands slurry handling
- Chemical injection lines
- Gas gathering systems
- Tank drain and sampling valves
Types:
- Lubricated Plug: Sealant injected between plug and body, reduces torque and provides positive seal. Common in gas service
- Non-Lubricated / Sleeved Plug: PTFE sleeve eliminates need for sealant. Low maintenance
- Pressure-Balanced Plug: Reduced torque at high pressure via balance ports
Typical Standards: API 599, API 6D
Sizes: 1/2″ to 36″
Pressure Classes: 150# to 2500#
7. Choke Valves
High-pressure control valves designed to manage flow rate and reduce pressure from the wellhead. Subject to extreme velocities, erosion, and corrosion.
Primary Applications:
- Wellhead flow control (production chokes)
- Managed pressure drilling
- Injection control (water, gas, chemical)
Choke Valves
Types:
- Fixed Bean (Positive Choke): Replaceable orifice bean. Simple and robust. For steady flow conditions
- Adjustable / Needle & Seat Choke: Externally adjustable flow orifice. Fine flow control
- Cage-Guided Choke: Multi-stage pressure reduction through a cage with drilled holes. Reduced noise and erosion
- Plug & Cage Choke: Combined plug and multi-port cage for severe service
Trim Materials: Stellite, tungsten carbide, ceramic (for erosion resistance)
Typical Standards: API 6A
Sizes: Typically 1″ to 6″
Pressure Ratings: 2,000 to 20,000 psi (API 6A ratings)
8. Control Valves
Automated modulating valves for precise control of process variables (pressure, flow, level, temperature). Includes the actuator, positioner, and accessories.
Primary Applications:
- Process control loops in refineries and gas plants
- Steam letdown and attemperation
- Anti-surge control for compressors
- Level control on separators and vessels
- Pressure reduction stations
Body Types:
- Globe Style Control Valve: Proven, reliable, excellent throttling
- Rotary Control Valve (V-Ball, Segmented Ball, Eccentric Plug): High capacity, compact, lower cost
- Axial Flow Control Valve: Low noise, high capacity, compact
Actuation:
- Pneumatic (Diaphragm or Piston): Most common in oil and gas
- Electric: For remote locations without instrument air
- Hydraulic: For high-force applications
- Electro-Hydraulic: Combines electric control with hydraulic power
Typical Standards: ISA-75, IEC 60534 (sizing and noise prediction), API 6D (for pipeline control valves)
9. Safety & Relief Valves
Automatically open to relieve excess pressure and protect equipment, vessels, and piping from overpressure. Mandated by code.
Primary Applications:
- Pressure vessel overpressure protection (ASME Section VIII)
- Pipeline surge protection
- Thermal relief for trapped liquid
- Boiler and steam system protection
Types:
- Spring-Loaded Safety Valve: Popping action, rapid full opening. For compressible fluids (gas, steam)
- Spring-Loaded Relief Valve: Gradual opening proportional to overpressure. For incompressible fluids (liquid)
- Pilot-Operated Safety-Relief Valve: Pilot valve controls main valve opening. Tight shutoff to within 5% of set pressure. For critical applications
Typical Standards: API 526 (flanged steel), ASME Section VIII (design), API 520/521 (sizing and installation)
10. Wellhead & Christmas Tree Valves
Surface valves controlling flow at the wellhead. Designed to API 6A for extreme pressures and sour service.
Primary Applications:
- Wellhead isolation and flow control
- Christmas tree (Xmas tree) assemblies
- Frac and stimulation operations
Wellhead & Christmas Tree Valves
Types:
- API 6A Gate Valve: Manual or actuated, through-conduit slab gate design
- API 6A Ball Valve: For rapid shutoff, often used as wing valves
- API 6A Check Valve: Downhole and surface flowback prevention
- Surface Safety Valve (SSV): Fail-safe closed on loss of signal. Actuator-mounted on wellhead gate valve
Typical Standards: API 6A, API 6AV1 (actuator qualification)
Pressure Ratings: 2,000 to 20,000 psi
Temperature Classes: K (-60°C) to Y (+345°C)
Material Classes: AA (General) to HH (Severe Sour Service)
Valve Selection Matrix
| Application | Recommended Valve Type | Key Considerations |
|---|---|---|
| Pipeline block valve (gas/oil) | Trunnion Ball or Through-Conduit Gate | Full bore for pigging, fire-safe |
| Pump discharge isolation | Gate or Ball | Tight shutoff, rapid operation |
| Compressor discharge | Ball + Axial Check Valve | Fast check closure, vibration resistant |
| Flow regulation | Globe or Control Valve | Throttling range, cavitation/flashing |
| Steam isolation | Pressure-Seal Gate or Globe | High-temperature packing, pressure rating |
| Cooling water isolation | Butterfly | Large diameter, cost-effective |
| Sour gas service | Ball or Gate (NACE MR0175) | HIC/SSC resistant materials, hardness control |
| Wellhead flow control | API 6A Choke + Gate | Erosion-resistant trim, high pressure |
| Emergency shutdown (ESD) | Trunnion Ball (actuated) | Fail-safe, partial stroke testing |
| Safety overpressure | Pilot-Operated Relief Valve | Tight shutoff, full lift at set pressure |
| Produced water / slurry | Plug or Metal-Seated Ball | Abrasion resistance |
Actuation Options
| Actuator Type | Best For | Features |
|---|---|---|
| Manual (Handwheel / Lever) | Small valves, infrequent operation | Low cost, no external power |
| Pneumatic Diaphragm | Control valves | Smooth modulation, fail-safe spring |
| Pneumatic Piston | Large ball/gate valves, high thrust | Compact, high force |
| Electric (Multi-Turn) | Gate/globe valves | Remote control, no instrument air |
| Electric (Quarter-Turn) | Ball/butterfly/plug valves | Compact, plug-and-play |
| Hydraulic | Subsea, high-force wellhead | High reliability, HPU required |
| Gas-Over-Oil | Pipeline ESD valves, remote locations | Self-contained, fail-safe |
Material & Trim Options
| Service Condition | Body Material | Trim Material |
|---|---|---|
| Sweet hydrocarbon (general) | Carbon Steel (WCB, LCB) | 13Cr / 316 SS |
| Sour service (H2S) | Carbon Steel (NACE MR0175) | 316 SS, Duplex, Inconel 718 |
| High temperature | Chrome-Moly (WC6, WC9) | Stellite, 316 SS |
| Cryogenic (LNG, LPG) | LCB, LCC, CF8M | 316 SS with extended bonnet |
| Seawater / chlorides | Duplex, Super Duplex, Monel | Duplex, Hastelloy |
| Acid service | Hastelloy, Alloy 20, PTFE-lined | Hastelloy, PTFE |
| Abrasive slurry | Carbon Steel with ceramic lining | Tungsten Carbide, Ceramic |
How We Support Your Valve Requirements
- Technical Bid Evaluation: We review valve data sheets against your process conditions, flagging undersized trims, incorrect materials, or missing testing
- Full Traceability: MTRs, pressure test charts, NDE reports, and fire-safe certificates delivered with every valve
- Actuation Packages: Complete valve + actuator + positioner + solenoid assemblies, tested and calibrated
- Aftermarket Support: Spare parts, seal kits, and replacement trim for in-service valves