Virab — Cast Iron Industrial Valves for Water & HVAC
Virab is a well-known Iranian manufacturer of cast iron industrial valves. Powered by modern engineering, a disciplined quality-control process, and skilled staff, Virab delivers a complete range of flow-control solutions for water, wastewater, irrigation, and heating/cooling plants. Compliance with international standards in design, casting, machining, and coating has made these products durable, safe, and reliable—trusted by contractors and operators alike, and ready for export-grade projects.
History & Development
After many years in the valve supply chain, Virab focused the last ~7 years on localizing and producing ductile-iron industrial valves. The goal: reduce imports and offer products on par with global standards for water and sewer networks. This strategy built a portfolio that covers common project needs nationwide while maintaining strong performance and reliability. Investments include premium raw materials, electrostatic epoxy lines, continuous design improvement, and an end-to-end after-sales cycle.
Scope & Product Portfolio
Virab designs and manufactures ductile-iron valves for isolation, on/off, and flow safety.
- Gate Valve: Full shut-off for pipelines; suitable for raw and treated water and many neutral fluids.
- Butterfly Valve: Compact on/off solution with limited throttling; available in Wafer, Lug, and Flanged types.
- Check Valve: Prevents backflow and water hammer; Swing, Wafer/Disc, and Lift types.
- Accessories & Operators: Lever, manual gearbox; electric/pneumatic actuators available on request.
Applications
- Urban/rural water distribution, pump stations, and treatment plants
- Condensate return and temperature-controlled heating/cooling systems
- Agricultural irrigation, greenhouses, and filtration skids
- Raw water and wastewater with suspended solids (with correct trim/seat selection)
Technical Specifications & Standards
- Body: Ductile iron (higher strength and impact absorption than grey iron)
- Seat/Sealing: Engineering elastomers (EPDM or NBR) per fluid and temperature
- Coating: Electrostatic epoxy for corrosion resistance in wet environments
- Reference standards (design/dimensions): DIN/EN family (e.g., EN 1092-2 flanges, EN 558 face-to-face)
- Tightness & strength tests: Industrial hydrostatic routines (e.g., EN 12266-1)
- Typical cold/warm-water duty: up to PN10 (many models also in PN16 by size) and fluid temperature to ~80 °C; final selection depends on model, size, and seat.
Note: Always confirm allowable pressure/temperature from the datasheet of the exact model/size. Seat type, end connection, or actuator may change the rating.
Comparative Table — Virab Cast-Iron Valves
| Valve Type | Primary Function | Common End Connection | Usual Size Range (DN) | Typical Rating | Key Advantage | Notable Uses |
|---|---|---|---|---|---|---|
| Gate Valve | Full on/off isolation | Flanged (EN 1092-2) | 50–600* | PN10/PN16* | Linear sealing; very low headloss when fully open | Trunk mains, municipal/industrial branches |
| Butterfly (Wafer/Lug/Flanged) | On/off and limited throttling | Wafer / Lug / Flanged | 50–600* | PN10/PN16* | Short length, light weight, easy between-flange install | Pump stations, HVAC plants, irrigation |
| Check (Swing/Wafer) | Prevent backflow | Wafer / Flanged | 50–400* | PN10/PN16* | Simple design, low maintenance | Pump discharges, manifolds, sewer networks |
* Depending on model and size program.
Design & Manufacturing Differentiators
- Controlled casting for uniform wall thickness and surface quality
- Precision-machined seats for repeatable performance over many cycles
- Even, high-adhesion epoxy coating for moisture and ion resistance in water service
- Wide operator options: lever, gearbox, and actuator-ready for automation
- Step-by-step QC: from inbound materials to 100% hydrostatic tightness testing
Selection Guide — Which Virab Valve Fits Your Project?
- Fluid & temperature: raw/treated water? solids? below 80 °C or special seat needed?
- Pressure & transients: nominal PN and water-hammer risk
- Control objective: on/off (Gate/Butterfly) or backflow prevention (Check)
- Space/weight limits: if installation length matters, Wafer Butterfly is compact
- Pipe connection: cast-iron/steel/PE with flanged ends; match flange standard to EN 1092-2
- Operation method: manual (lever/gear) or automated (electric/pneumatic actuator)
- Serviceability: choose designs that allow easy access where maintenance is difficult
Sample Technical Data — Quick Reference
| Parameter | Value/Options |
|---|---|
| Body | Ductile iron |
| Disc/Gate | Ductile iron or steel/stainless (by model) |
| Seat | EPDM or NBR per fluid |
| Coating | Electrostatic epoxy (inside/outside) |
| End Connection | Wafer / Lug / Flanged (EN 1092-2) |
| Face-to-Face | EN 558 (typical series by type) |
| Tightness Test | Hydrostatic routines (e.g., EN 12266-1) |
| Nominal Pressure | PN10 (with PN16 options on some sizes/models) |
| Water Temp Range | ~0…80 °C (per seat and model) |
| Operator | Lever, gearbox, actuator-ready |
| Service | Water, raw water, light sewage, HVAC (per model datasheet) |
Installation, Commissioning & Operation
- Alignment: misaligned flanges create stress and leakage at the seat
- Line cleaning: flush/blowout before install to protect the seat
- Bolting torque: tighten in a cross pattern with recommended torque
- Flow direction: critical on check valves—follow body arrows/marks
- Actuators: match ISO mounting pads on body/gearbox with actuator specs
- Throttling with butterfly: use only within a limited range; for continuous control, prevent seat wear/cavitation and respect allowable velocities
Preventive Maintenance
- Periodic inspection of seats/seals—especially on lines with solids
- Lubrication and gearbox service as specified
- Exercise valves periodically to prevent sticking in seldom-used systems
- Inspect epoxy coating; repair any damage to avoid localized corrosion
Advantages for Owners & Contractors
- Consistent quality through staged QC and 100% tightness testing per batch
- Broad size and end-connection coverage for water/wastewater projects
- Familiar European standards simplify engineering and replacements in existing assets
- After-sales support: consumables, technical guidance, and (on many items) up to one-year replacement warranty per model/series policy
Wafer Butterfly Valves — Why They’re Popular
- Fast between-flange installation with minimal space required
- Low operating torque; compact lever/gear options
- Field-serviceable with low ownership demands in water and irrigation lines
- EPDM/NBR seat options to match temperature and fluid properties
Factors Influencing Lead Time & Configuration
- Size (DN) and nominal pressure (PN)
- End connection (Wafer/Lug/Flanged) and operator type
- Seat material and special coating/corrosion-resistance needs
- Project conditions (batch orders, delivery scheduling, special in-process tests)
Engineering Documentation Checklist
Include these in the project datasheet to speed up review and avoid errors:
- Valve type, size, PN, and flange standard
- Fluid type, operating temperature, and design velocity
- Seat type and trim materials if required
- Operator (manual/electric/pneumatic) and voltage/air specs
- Test requirements and project certificates
Market Position in Iran
Stable quality, alignment with reference standards, and practical, fit-for-purpose solutions have made Virab a dependable choice alongside other reputable domestic brands. Engineering-driven design, standard-grade materials, and robust coatings deliver long-term satisfaction, while accessible after-sales services help reduce operational risk.
Supply via “Tamam Baha”
As a distributor of Virab, Tamam Baha supplies the core cast-iron valve range (gate, butterfly, and check) in common sizes and ratings for civil, industrial, and MEP projects. Beyond product authenticity and spec matching, the team provides pre-purchase engineering advice, actuator coordination, and professional stock updates. Virab is available through multiple channels; if you need an exact technical proposal and a scheduled sourcing plan with datasheets, the Tamam Baha team can prepare them accordingly.
