DN25-PN25 Close Die Forged Plunger Valves

Size DN25 (1 inch)
Pressure Class PN25 (25 bar / 360 PSI)
Body Material Forged Carbon Steel (A105) / Forged Stainless Steel (A182 F304/F316) User specified
Manufacturing Process Close Die Forged (Precision Forging)
Design Standard DIN 3356 / EN 13709 / ASME B16.34 (adaptable)
End Connection Standard EN 1092-1 (Flanged) / ASME B1.20.1 (NPT) / ASME B16.11 (SW) / ASME B16.25 (BW)
Face to Face Standard EN 558-1 / DIN 3202 F1 (for flanged)
Test & Inspection Std. EN 12266-1 / API 598
Leakage Class Zero leakage (soft seal)

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TECHNICAL DATA SHEET

Product Name: DN25 PN25 Close Die Forged Plunger Valve
Model/Specification: DN25-PN25-PLUNGER
نوع الصمام: Plunger Valve (Piston-Type Stop Valve)
Connection Type: Flanged (RF) / Threaded (NPT) / Socket Weld / Butt Weld User specified

Basic Design Parameters

المعلمة	Standard/Specification
مقاس	DN25 (1 inch)
Pressure Class	PN25 (25 bar / 360 PSI)
مادة الجسم	Forged Carbon Steel (A105) / Forged Stainless Steel (A182 F304/F316) User specified
Manufacturing Process	Close Die Forged (Precision Forging)
Design Standard	DIN 3356 / EN 13709 / ASME B16.34 (adaptable)
End Connection Standard	EN 1092-1 (Flanged) / ASME B1.20.1 (NPT) / ASME B16.11 (SW) / ASME B16.25 (BW)
Face to Face Standard	EN 558-1 / DIN 3202 F1 (for flanged)
Test & Inspection Std.	EN 12266-1 / API 598
فئة التسرب	Zero leakage (soft seal)

Technical Specifications

المعلمة	Details
نوع الصمام	Plunger Valve (Piston Valve) – Guided plunger design
Bonnet Type	Bolted Bonnet
Stem Type	Outside Screw and Yoke (OS&Y), Rising Stem
Plunger Type	Polished cylindrical plunger, one-piece forged
Sealing Principle	Elastic sealing rings (graphite/PTFE) compressed by plunger – metal-to-soft seal
Sealing Rings	Two-piece set (upper & lower) for positive shut-off
Applicable Media	Steam, Hot Water, Oil, Gas, Corrosive Fluids (depending on material)
نطاق درجة الحرارة	-29°C to +300°C (with PTFE rings) / up to 450°C (with flexible graphite)
عملية	Handwheel (standard) / Gearbox / Actuator

Material of Construction (Recommended – Carbon Steel)

Part Name	مادة	Standard/Grade
جسم	Forged Carbon Steel	ASTM A105
Bonnet	Forged Carbon Steel	ASTM A105
Plunger	Stainless Steel (Hardened)	ASTM A276 420 / A182 F304 (Chrome plated optional)
Sealing Rings	Flexible Graphite / PTFE	Graphite for high temp, PTFE for chemical service
ينبع	Stainless Steel	ASTM A182 F6a (13Cr) / A276 420
Gland Packing	Flexible Graphite / PTFE	As backup seal
Bonnet Gasket	Spiral Wound	Stainless Steel + Graphite
Stem Nut	Aluminum Bronze	C95400 / CuAl10Fe3
Body Bolts/Nuts	Alloy Steel	ASTM A193 B7 / A194 2H (for CS) or A193 B8 / A194 8 (for SS)
Handwheel	Malleable Iron / Carbon Steel	A197 / A216 WCB

*For Stainless Steel version (A182 F304/F316), bolting changes to B8/8, body/bonnet to SS.*

Main Dimensions & Connection Details

*Note: Dimensions for Flanged Ends (RF) according to EN 1092-1 and EN 558-1. Other end connections vary.*

4.1 End-to-End Dimensions (Face-to-Face)

مقاس	PN Rating	L (mm)	H (approx. mm)	W (Handwheel mm)	Weight (approx. kg)
DN25	بي إن 25	160	~180	125	~4.5

4.2 Flange Details (Per EN 1092-1 – Type 11 / PN25)

المعلمة	DN25 Flange
Flange Outside Diameter (D)	115 mm
Bolt Circle Diameter (PCD / k)	85 mm
Number of Bolt Holes	4
Bolt Hole Diameter (d2)	14 mm
Bolt Thread Size	M12
Raised Face Height	2 mm
Flange Thickness (C)	16 mm

4.3 End Preparation (Alternative Connections)

Connection Type	معيار	Details
Threaded (NPT)	ASME B1.20.1	1″ NPT Female
Socket Weld (SW)	ASME B16.11	1″ Socket Weld per standard
لحام بعقب (BW)	ASME B16.25	Bevel prepared ends

Pressure-Temperature Rating

*Material Group: Carbon Steel (A105) or Stainless Steel (F304/F316) – Sealing rings limit temperature.*

Temperature (°C)	Max. Working Pressure (bar)	ملحوظات
-29 to 120	25	Full rating (PTFE rings)
150	24
200	23	(Graphite rings)
250	22	(Graphite rings)
300	20	(Graphite rings)
350	18	(Graphite rings – high temp)
400	16	(Graphite rings)

Note: With PTFE rings, max temperature 200°C. With graphite rings, max 450°C (but PN rating derated at higher temps).

Test Pressure (EN 12266-1 / API 598)

Test Type	Medium	Pressure (bar)	Acceptance Criteria
Shell Test (Hydrostatic)	Water	38	1.5 x PN (no visible leakage)
Seat Test (High Pressure)	Water	27.5	1.1 x PN (zero leakage)
Seat Test (Low Pressure)	Air / N2	5.5 – 6	Bubble-tight

Features & Applications

Key Features:

Zero Leakage Design: Elastic sealing rings compressed by the polished plunger ensure bubble-tight shut-off, exceeding metal-seated valve performance .
Close Die Forged Body: Provides superior strength, uniform grain flow, and absence of porosity – ideal for demanding service .
Self-Adjusting Seals: The sealing rings compensate for wear and thermal variations, maintaining a tight seal over extended life .
Easy Maintenance: Sealing rings can be replaced without removing the valve body from the pipeline (with top-entry bonnet) .
Excellent Throttling Capability: The plunger design allows for smooth flow control with minimal erosion .
Double Seal Protection: Two independent sealing rings provide redundancy .
Corrosion & Wear Resistance: Hardened stainless steel plunger resists scratching and corrosion .
Backseat Design: Protects stem packing when valve fully open .
OS&Y Design: Visual indication of valve position .

Main Applications:

Steam Systems: Steam distribution, boiler blowdown, tracer lines .
Thermal Oil / Heat Transfer Fluids: High-temperature liquid services .
Chemical Processing: Handling corrosive fluids with PTFE sealing rings .
Water & Wastewater: Isolation and control where zero leakage is required .
Oil & Gas: Light hydrocarbon services .
General Industrial Piping: Reliable shut-off for gases and liquids .

Disclaimer: The above data is prepared based on common industry standards (DIN/EN) for forged plunger valves. Specific dimensions, materials, and pressure ratings may vary by manufacturer. The final technical agreement and certified drawings shall prevail.

ضمان:

تلتزم شركة سافي فالفز بتقديم منتجات عالية الجودة وخدمة ما بعد البيع مريحة. نضمن لصماماتنا عمر خدمة لا يقل عن ١٢ شهرًا، نوفر خلالها جميع قطع الغيار اللازمة وتعليمات الصيانة المفصلة مجانًا. خلال فترة الضمان، في حال حدوث أي ضرر غير بشري، نستبدل المكونات مجانًا ونقدم دعمًا فنيًا احترافيًا. بعد انتهاء الضمان، يدفع العميل فقط تكلفة قطع الغيار، مع الاستفادة من خدمات الصيانة المخفضة. هدفنا هو مساعدة عملائنا على خفض تكاليف التشغيل وتحسين كفاءة الإنتاج من خلال جودة موثوقة ودعم شامل لما بعد البيع. سواءً للاستفسارات الفنية أو احتياجات الصيانة، سيستجيب فريق خبرائنا على الفور لضمان الحفاظ على الأداء الأمثل لنظام صماماتك في جميع الأوقات.

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