Описание
Technical Datasheet: Non-Rising Stem Gate Valve
(Cast Iron Body / Bronze Seated / Brass Stem / NPT Threaded / Handwheel)
- General Information
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Item
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Standard Configuration
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User Specification / Remarks
|
|
Тип клапана
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Non-Rising Stem Gate Valve (Inside Screw)
|
Stem does not rise; ideal for limited space
|
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Материал корпуса
|
Cast Iron (ASTM A126 Class B / EN-GJL-250)
|
|
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Seat Material
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Bronze (Integral or renewable)
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Bronze-to-bronze sealing
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Stem Material
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Brass (C36000 / C37700)
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Corrosion resistant
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End Connection
|
Резьбовой (Female NPT per ASME B1.20.1)
|
|
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Операция
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Handwheel
|
Malleable iron / Ductile iron handwheel
|
|
Design Standard
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MSS SP-70 / MSS SP-80 (Bronze trim) / ASME B16.34 (mod)
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|
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Лицом к лицу
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Manufacturer standard per MSS SP-70 (Threaded ends)
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|
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Inspection & Test
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API 598 / MSS SP-70
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|
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Номинальное давление
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Class 125 / Class 150 (Optional)
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PN10 / PN16 available
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Size Range
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½” – 4″ (DN15 – DN100)
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|
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Диапазон температур
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-20°C to +150°C (Limitation of brass stem and bronze seats)
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|
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Stem Type
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Non-rising stem (Inside screw)
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|
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Wedge Type
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Solid wedge / Double disc (Optional)
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- Design Features
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Feature
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Описание
|
Benefit
|
|
Non-Rising Stem
|
Stem rotates but does not move linearly; threads inside valve
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Suitable for tight spaces, buried service
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|
Handwheel Operation
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Sturdy handwheel for manual operation
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Easy to operate, torque multiplication
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Bronze Seated
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Seat rings and wedge faces are bronze
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Excellent corrosion resistance, long life, smooth operation
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|
Full Port Design
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Straight-through full bore
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Low pressure drop, allows pigging
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Inside Screw
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Stem threads are inside the valve, protected from environment
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Longer stem life, no external threads to corrode
|
|
Renewable Seat Rings
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Seat rings can be replaced (optional)
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Extended valve life
|
|
Cast Iron Body
|
Robust, cost-effective
|
Suitable for water and non-corrosive services
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- Bill of Materials (Main Components)
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No.
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Part Name
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Материал
|
Замечания
|
|
1
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Тело
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Cast Iron (ASTM A126 Class B)
|
|
|
2
|
Bonnet
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Cast Iron (ASTM A126 Class B)
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|
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3
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Wedge / Gate
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Bronze (ASTM B62 / B584)
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Solid wedge, bronze faces
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4
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Seat Ring (Body)
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Bronze (ASTM B62)
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Thread-in or pressed-in
|
|
5
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Корень
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Brass (C36000 / C37700)
|
Non-rising stem
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6
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Stem Nut / Thrust Washer
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Bronze / Brass
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|
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7
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Packing
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Graphite / PTFE
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|
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8
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Gland / Gland Follower
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Cast Iron / Brass
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|
|
9
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Bonnet Gasket
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Compressed Fiber / Graphite
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|
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10
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Bonnet Bolts / Studs
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Steel (Zinc Plated) / Stainless Steel
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|
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11
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Handwheel
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Malleable Iron / Ductile Iron
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|
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12
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Handwheel Nut
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Steel / Brass
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|
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13
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Nameplate
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Stainless Steel / Aluminum
|
|
- Technical Parameters & Performance
|
Item
|
Спецификация
|
|
Medium
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Water, Oil, Gas, Air, Steam, Non-corrosive Fluids
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|
Operating Temperature
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-20°C to +150°C (Brass stem limit)
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|
Max Working Pressure
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Class 125: 200 psi @ 100°F / 13.8 bar @ 38°C (Derate at higher temps)
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|
Seat Material
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Bronze-to-Bronze
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|
Sealing Performance
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API 598: Liquid – No visible leakage; Air – Class B permissible
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|
Flow Direction
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Bidirectional
|
|
Flow Characteristic
|
On-Off (Not for throttling)
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|
Тип отверстия
|
Full Bore (Standard)
|
|
Stem Design
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Inside Screw, Non-Rising
|
|
Handwheel Rotation
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Clockwise to Close
|
|
Installation Position
|
Any position
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- Test Pressure (Reference: Per API 598 / MSS SP-70)
|
Номинальное давление
|
Shell Test (Hydrostatic)
|
Seat Test (Hydrostatic)
|
Low Pressure Seat Test (Pneumatic)
|
|
Class 125
|
400 psi (2.8 MPa)
|
200 psi (1.4 MPa)
|
50-80 psi (0.34-0.55 MPa)
|
|
Класс 150
|
425 psi (2.9 MPa)
|
315 psi (2.2 MPa)
|
50-80 psi (0.34-0.55 MPa)
|
|
*(Note: Tests performed per API 598 / MSS SP-70)*
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|
|
|
- Dimensions & Weight (Reference: Threaded End NPT / MSS SP-70)
|
NPS
|
DN (mm)
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L (Face-to-Face) mm
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H (Closed) mm (approx)
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Handwheel Diameter (mm)
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Weight (kg) approx
|
|
½”
|
15
|
79
|
110
|
80
|
1.5
|
|
¾”
|
20
|
92
|
120
|
80
|
2.0
|
|
1″
|
25
|
111
|
135
|
100
|
2.8
|
|
1¼”
|
32
|
120
|
150
|
100
|
3.6
|
|
1½”
|
40
|
152
|
170
|
125
|
5.0
|
|
2″
|
50
|
172
|
195
|
125
|
7.0
|
|
2½”
|
65
|
195
|
225
|
160
|
11.0
|
|
3″
|
80
|
210
|
255
|
160
|
15.5
|
|
4″
|
100
|
254
|
300
|
200
|
23.5
|
|
(Note: Dimensions are for reference only. Refer to certified GA drawing for exact dimensions.)
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- Special Requirements / Options
- Номинальное давление: Class 125 / Class 150
- Конечное соединение: NPT / BSP (Parallel or taper)
- Seat Type: Integral / Renewable bronze seat rings
- Wedge Material: Bronze (Standard) / Cast Iron with Bronze overlay / Stainless Steel
- Материал стержня: Brass (Standard) / Stainless Steel (304/316) / Bronze
- Тип капота: Screwed-in bonnet / Bolted bonnet
- Packing Material: Graphite / PTFE / Non-asbestos
- Handwheel: Malleable iron / Ductile iron / Cast iron
- Test Certificate: EN 10204 Type 2.2 / 3.1
- Special Cleaning: For potable water / Oxygen service
- NACE Compliance: MR0175 (Requires material upgrade)
- Аксессуары: Locking device / Extension stem / Position indicator / Chainwheel
Design Notes:
- Non-Rising Stem (NRS) : The stem rotates within the valve; the gate travels along the stem threads. This design is ideal where vertical space is limited.
- Handwheel Operation: Provides mechanical advantage for easy operation. Standard rotation is clockwise to close.
- Bronze Trim: Provides excellent corrosion resistance and long-term reliable sealing. Bronze-on-bronze seats are standard for water and low-pressure steam services.
- Cast Iron Body: Suitable for non-shock applications; must be protected from rapid temperature changes and water hammer.
Application Notes:
- Suitable for: Water distribution, wastewater, irrigation, fire protection, HVAC, and general industrial services.
- Not suitable for: High-pressure steam, severe thermal cycling, or highly corrosive fluids (consult manufacturer for material upgrades).
- Installation: Can be installed in any position. For buried service, consider stem extension and position indicator.
Note: This datasheet is prepared for a Non-Rising Stem Gate Valve with cast iron body, bronze seats, brass stem, NPT ends, and handwheel operation per MSS SP-70 / API 598. Ensure selected materials, pressure rating, and trim are compatible with the specific service conditions.
ГАРАНТИЯ:
SAVVY VALVES стремится предоставлять исключительное качество продукции и беспроблемное послепродажное обслуживание. Наши клапаны гарантированно обеспечивают минимальный срок службы 12 месяцев, в течение которых мы бесплатно поставляем все необходимые запасные части и подробные инструкции по техническому обслуживанию. В течение гарантийного срока, если произойдет какой-либо ущерб, не вызванный человеком, мы бесплатно заменим компоненты и предоставим профессиональную техническую поддержку. После истечения срока гарантии клиентам нужно будет оплатить только стоимость запасных частей, при этом продолжая пользоваться скидками на услуги по техническому обслуживанию. Наша цель — помочь клиентам сократить эксплуатационные расходы и повысить эффективность производства за счет надежного качества и комплексной послепродажной поддержки. Будь то технические запросы или потребности в техническом обслуживании, наша команда экспертов оперативно отреагирует, чтобы гарантировать, что ваша клапанная система всегда будет поддерживать оптимальную производительность.
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